Featured Calculators

• Acceleration Calculator — Calculate acceleration from a velocity change, from force and mass, or from distance.
• Age Calculator — Calculate exact age in years, months and days, plus total days, hours and minutes.
• Annualized Return Calculator — Convert a total return over any period into an equivalent annual rate.
• Area Converter — Convert between square metres, square feet, acres, hectares and more.
• Attendance Calculator — Track your attendance percentage and how many classes you can still miss.
• Baker's Percentage Calculator — Express a bread formula as percentages of flour, or work back from a dough weight.
• Basic Calculator — Evaluate an arithmetic expression with correct operator precedence.
• Battery Runtime Calculator — Calculate how long a battery will power a load, allowing for depth of discharge.
• Beam Deflection Calculator — Calculate maximum deflection, moment and stress for a loaded beam.
• Binomial Probability Calculator — Find the probability of a number of successes in a fixed number of trials.
• Bitwise Calculator — Apply AND, OR, XOR, NOT and shift operations at any bit width.
• BMI Calculator — Calculate body mass index and see where it falls on the WHO classification.
• BMR Calculator — Calculate basal metabolic rate — the calories you burn at complete rest.
• Body Fat Calculator — Estimate body fat percentage using the US Navy tape measurement method.
• Bolt Torque Calculator — Calculate tightening torque and clamp load for a bolted joint.
• Break-Even Calculator — Find the sales volume and revenue needed to cover all your costs.
• Brick Calculator — Calculate bricks and mortar needed for a wall, including openings.
• Burn Rate Calculator — Calculate gross and net burn, and how long your cash will last.
• Business Days Calculator — Count working days between two dates, excluding weekends and holidays.
• CAGR Calculator — Find the compound annual growth rate between a starting and ending value.
• Calorie Calculator — Find your daily calorie target for losing, maintaining or gaining weight.
• Cap Rate Calculator — Calculate capitalisation rate and implied property value from net operating income.
• Capital Gains Calculator — Calculate capital gain or loss on an investment and the tax at a rate you supply.
• Capital Gains Tax Calculator — Calculate tax on an asset sale, with separate short-term and long-term rates.
• Car Affordability Calculator — Work out how much car you can afford from a monthly budget or your income.
• Car Depreciation Calculator — Project what a vehicle will be worth after any number of years.
• Car Lease Calculator — Calculate a monthly lease payment from cap cost, residual and money factor.
• Car Loan Calculator — Work out car finance payments including trade-in, down payment and sales tax.
• Cash-on-Cash Return Calculator — Measure annual cash flow against the actual cash you invested.
• CGPA Calculator — Calculate CGPA on the 10-point scale and convert it to a percentage.
• Churn Rate Calculator — Calculate customer and revenue churn, and the lifespan they imply.
• Circle Calculator — Find area, circumference, radius or diameter of a circle from any one measurement.
• Coffee Ratio Calculator — Calculate coffee and water for any brew ratio and batch size.
• Color Converter — Convert a colour between HEX, RGB, HSL and CMYK, with the equivalent values shown in every format at once.
• Commission Calculator — Calculate commission earnings including tiered rates and a base salary.
• Compound Interest Calculator — See how money grows when interest earns interest, with optional regular contributions.
• Concrete Calculator — Calculate concrete volume for slabs, footings and columns, with cement, sand and aggregate quantities.
• Confidence Interval Calculator — Build a confidence interval for a mean or a proportion.
• Conversion Rate Calculator — Calculate conversion rate and the revenue impact of improving it.
• Cooking Measurement Converter — Convert between cups, tablespoons, teaspoons, millilitres and fluid ounces.
• Correlation Coefficient Calculator — Calculate Pearson correlation between two variables, with significance testing.
• Countdown Calculator — Count down to any future date in days, weeks, hours and business days.
• Credit Card Payoff Calculator — Find out how long your card takes to clear and what it truly costs.
• Crop Yield Calculator — Convert yield per area into total production, bushels and revenue.
• Crypto Average Price Calculator — Find your average entry price across multiple buys at different prices.
• Crypto DCA Calculator — Model a dollar-cost averaging plan and see the accumulated position and return.
• Crypto Futures P&L Calculator — Calculate profit, ROE and fees on a leveraged crypto futures position.
• Crypto Liquidation Price Calculator — Find the price at which a leveraged crypto position gets liquidated.
• Crypto Position Size Calculator — Calculate the position size that risks a fixed percentage of your account.
• Crypto Profit/Loss Calculator — Calculate profit or loss on a crypto trade after exchange fees.
• Crypto ROI Calculator — Calculate return on a crypto investment, including the annualised rate.
• Crypto Staking Rewards Calculator — Project staking rewards with compounding, in both coins and currency.
• Currency Converter — Convert between currencies using a rate you supply, including bank margin and fees.
• Customer Acquisition Cost (CAC) Calculator — Calculate what it costs to acquire one customer across sales and marketing.
• Customer Lifetime Value (LTV) Calculator — Estimate the total profit a customer generates over their relationship with you.
• Data Storage Converter — Convert between bytes, kilobytes, megabytes, gigabytes and terabytes.
• Date Add / Subtract Calculator — Add or subtract days, weeks, months or years from any date.
• Date Difference Calculator — Find the time between two dates in years, months, days, weeks and business days.
• Debt Payoff Calculator — See how long a debt takes to clear and how much extra payments save you.
• Density Calculator — Calculate density, mass or volume, and check whether something floats.
• Discount Calculator — Find the sale price and money saved from a percentage discount, including stacked offers.
• Dividend Calculator — Calculate dividend income per period and the yield on your holding.
• Dividend Reinvestment Calculator (DRIP) — Model a DRIP where dividends buy more shares, compounding your income.
• Dividend Yield Calculator — Calculate dividend yield, payout ratio and yield on cost.
• Dough Hydration Calculator — Calculate dough hydration, including flour and water carried in a starter.
• Down Payment Calculator — Work out the deposit needed and how long it takes to save it.
• Download Time Calculator — Work out how long a file takes to transfer at a given connection speed.
• Drawdown Calculator — Measure peak-to-trough decline and the gain needed to recover from it.
• EBITDA Calculator — Calculate EBITDA and EBITDA margin from either direction.
• Electrical Power Calculator — Calculate real, apparent and reactive power for single or three-phase supplies.
• Electricity Cost Calculator — Calculate the running cost of any appliance by hour, day, month and year.
• EMI Calculator — Work out a monthly instalment on a reducing-balance basis, and compare it against the same rate quoted flat.
• Energy Consumption Calculator — Audit household energy use by adding up appliance loads and running hours.
• EV Charging Cost Calculator — Calculate what it costs and how long it takes to charge an electric car.
• EV vs Gas Calculator — Compare running costs of an electric car against petrol, and find the break-even.
• Farm Gross Margin Calculator — Calculate gross margin per hectare from yield, price and variable costs.
• Fertilizer Calculator — Convert nutrient rates into product quantities for any fertiliser analysis.
• Final Grade Calculator — Find the score you need on the final exam to reach your target grade.
• Flooring Calculator — Calculate flooring area, packs needed and cost for any room shape.
• Force Calculator — Apply Newton’s second law to find force, mass or acceleration.
• Forex Currency Conversion Calculator — Convert a trade amount between currencies at a rate you supply, including exchange margin — for sizing forex positions, not everyday spending.
• Forex Margin Calculator — Calculate the margin required to open a forex position at a given leverage.
• Forex Pip Calculator — Count the pips between two prices and convert them into profit or loss.
• Forex Pip Value Calculator — Calculate the monetary value of one pip for any pair, lot size and account currency.
• Forex Position Size Calculator — Calculate the lot size that risks exactly your chosen percentage on a given stop.
• Forex Profit/Loss Calculator — Calculate profit or loss on a forex trade including spread and commission.
• Fraction Calculator — Add, subtract, multiply and divide two fractions, with the result fully simplified.
• Fuel Cost Calculator — Estimate the fuel cost of a trip and the cost per mile or kilometre.
• GPA Calculator — Calculate your grade point average from course grades and credit hours.
• Grade Percentage Calculator — Turn marks scored out of a total into a percentage, a letter grade and a pass or fail verdict.
• House Affordability Calculator — Find the house price you can afford using lender debt-to-income rules.
• Income Tax Calculator — Calculate income tax using progressive brackets you supply, with effective and marginal rates.
• Inflation Calculator — See how inflation changes purchasing power over time, forwards or backwards.
• Investment Calculator — Project an investment forward with regular contributions, and see it in real terms after inflation.
• Investment Fee Calculator — See how much management fees cost you over the life of an investment.
• Investment Growth Calculator — Project investment growth year by year, with contributions that can step up annually — see the full compounding schedule, not just the final number.
• IP Subnet Calculator — Calculate network address, broadcast, mask and usable host range from CIDR.
• Irrigation Calculator — Calculate irrigation water volume, run time and crop water requirement.
• Kinetic Energy Calculator — Calculate the energy of a moving object, or the speed for a given energy.
• Length Converter — Convert between metres, feet, inches, miles, kilometres and more.
• Leverage Calculator — Calculate effective leverage, margin required and how far price can move before a margin call.
• Linear Regression Calculator — Fit a least-squares line, with slope, intercept, r² and prediction.
• Livestock Feed Calculator — Calculate daily and seasonal feed requirements for a herd or flock.
• Loan Calculator — Work out the instalment on any amortizing loan, at monthly, fortnightly, weekly or quarterly repayments.
• Macro Calculator — Split your daily calories into protein, carbohydrate and fat targets.
• Markup Calculator — Calculate selling price from cost and markup, and see the resulting margin.
• Mean Calculator — Find the arithmetic mean (average) of a set of numbers.
• Moment of Inertia Calculator — Calculate second moment of area, section modulus and radius of gyration.
• Mortgage Calculator — Estimate your full monthly housing payment including taxes, insurance and down payment.
• MRR Calculator — Calculate monthly recurring revenue and break it into growth components.
• Normal Distribution Calculator — Find probabilities and z-scores for any normal distribution.
• Number Base Converter — Convert numbers between binary, octal, decimal, hexadecimal and any base.
• Ohm's Law Calculator — Solve for voltage, current, resistance or power from any two known values.
• One Rep Max Calculator — Estimate your 1RM from a submaximal set and get a full percentage training table.
• Oven Temperature Calculator — Convert oven temperatures between Celsius, Fahrenheit, gas mark and fan.
• Paint Calculator — Calculate paint needed for walls and ceilings, allowing for doors, windows and multiple coats.
• Password Entropy Calculator — Measure password strength in bits of entropy and estimate crack time.
• Percentage Calculator — Work out what X% of a number is, what percent one number is of another, and reverse percentages.
• Percentage Change Calculator — Measure the percentage increase or decrease between an old value and a new value.
• Percentile Calculator — Find any percentile of a data set, or the percentile rank of a value.
• Pipe Flow Calculator — Convert between flow rate, velocity and pipe size using continuity.
• Pizza Dough Calculator — Calculate flour, water, salt and yeast for any number of pizza bases.
• Portfolio Return Calculator — Calculate the weighted return of a portfolio from its holdings.
• Position Size Calculator — Work out how many units to trade so a stop-loss hit costs exactly your intended risk.
• Profit Calculator — Calculate gross, operating and net profit from revenue and costs.
• Profit Margin Calculator — Calculate profit margin, markup and the selling price you need to hit a target margin.
• Projectile Motion Calculator — Find the range, peak height and flight time of a launched projectile.
• Property Tax Calculator — Calculate annual property tax from assessed value, rate and exemptions.
• Pythagorean Theorem Calculator — Find any missing side of a right triangle, plus its angles, area and perimeter.
• Quadratic Equation Solver — Solve ax² + bx + c = 0, including complex roots, vertex and discriminant.
• Quartile Calculator — Find Q1, Q2, Q3, the interquartile range and any outliers.
• Ratio Calculator — Simplify a ratio, scale it, and solve for a missing term.
• Reading Time Calculator — Estimate how long a text takes to read silently or aloud.
• Real Estate ROI Calculator — Total return on a property including cash flow, appreciation and principal paydown.
• Recipe Scaling Calculator — Scale a recipe up or down for a different number of servings.
• Rent vs Buy Calculator — Compare the total cost of renting against buying over a holding period.
• Rental Yield Calculator — Calculate gross and net rental yield on an investment property.
• Retirement Calculator — Project your retirement savings and check whether they will last through retirement.
• Revenue Growth Calculator — Calculate period-on-period growth rates and project revenue forward.
• Rice Water Ratio Calculator — Find the right water, cooking time and yield for any type of rice.
• Risk/Reward Ratio Calculator — Calculate the risk/reward ratio of a trade and the win rate it needs to break even.
• ROAS Calculator — Calculate return on ad spend and the break-even ROAS your margin requires.
• Roasting Time Calculator — Estimate roasting time and oven temperature by meat type and weight.
• ROI Calculator — Calculate return on investment as a percentage, with annualized return if you supply a holding period.
• Roofing Calculator — Calculate roof area from pitch and footprint, plus tiles or sheets needed.
• Running Calories Calculator — Estimate calories burned running, adjusted for pace, weight and incline.
• Running Pace Calculator — Calculate pace, time or distance, with split times for common race distances.
• Salary Calculator — Convert pay between hourly, daily, weekly, monthly and annual figures.
• Salary Tax Calculator — Full salary breakdown: income tax by bracket, payroll contributions and net pay.
• Sales Tax Calculator — Add sales tax to a price or extract the tax from a tax-inclusive total.
• Sample Size Calculator — Find the sample size needed for a target margin of error.
• Savings Calculator — Plan a savings goal: see what regular deposits grow to, or what you need to save each month.
• Seed Rate Calculator — Work out sowing rate from target plant population, seed weight and germination.
• Serving Size Calculator — Work out how much food to buy for a given number of guests.
• Sharpe Ratio Calculator — Measure risk-adjusted return, from summary figures or a return series.
• SIP Calculator — Project the maturity value of a Systematic Investment Plan, with optional annual step-up.
• Solar Battery Calculator — Size a home battery to store solar surplus and cut evening grid imports.
• Solar Panel Calculator — Work out how many solar panels you need to cover your electricity use.
• Solar Panel Output Calculator — Estimate daily, monthly and annual generation from a solar array.
• Solar Payback Calculator — Find how long a solar system takes to pay for itself.
• Solar Savings Calculator — Estimate annual and lifetime bill savings from a solar system.
• Solar System Size Calculator — Calculate the kW solar system size needed for your electricity consumption.
• Speed Converter — Convert between km/h, mph, m/s, knots and the speed of light.
• Split Bill Calculator — Split a bill evenly or by individual spend, with tip and tax handled fairly.
• Square Root Calculator — Find the square root of any number, plus the simplified radical form.
• Standard Deviation Calculator — Compute standard deviation, variance, mean and the full set of descriptive statistics.
• Stock Average Price Calculator — Find your average cost per share across multiple purchases.
• Stock Profit/Loss Calculator — Calculate profit or loss on a share trade after commission, including dividends received.
• Stress and Strain Calculator — Calculate axial stress, strain, elongation and Young’s modulus.
• T-Test Calculator — Run a one-sample or two-sample t-test and get the p-value.
• Take-Home Pay Calculator — Estimate net pay after tax and deductions using rates you supply.
• TDEE Calculator — Calculate total daily energy expenditure — the calories you burn in a full day.
• Temperature Converter — Convert between Celsius, Fahrenheit, Kelvin and Rankine.
• Tile Calculator — Calculate how many tiles, adhesive and grout you need for floors or walls.
• Time Card Calculator — Total a weekly timesheet from daily clock-in and clock-out times.
• Time Duration Calculator — Calculate the duration between two times, with optional break deduction.
• Tip Calculator — Calculate a tip and split the total between any number of people.
• Tire Size Calculator — Compare two tyre sizes and find the speedometer error from changing them.
• Trading Expectancy Calculator — Calculate the average amount a strategy makes or loses per trade.
• Trading Profit/Loss Calculator — Calculate profit or loss on a long or short trade after fees and commission.
• Unit Price Calculator — Compare products by price per unit to find which is genuinely better value.
• Uptime SLA Calculator — Convert an availability percentage into allowed downtime per day, month and year.
• VAT Calculator — Add VAT to a net price or strip it back out of a gross price, at any rate, showing the tax amount separately.
• Velocity Calculator — Find velocity from distance and time, or from acceleration using the kinematic equations.
• Voltage Drop Calculator — Calculate voltage drop over a cable run and check it against limits.
• Volume Calculator — Find the volume of a box, cylinder, sphere, cone, pyramid or capsule.
• Volume Converter — Convert between litres, gallons, cubic metres, cups, pints and more.
• Watts to Amps Calculator — Convert power in watts to current in amps for AC or DC circuits.
• Weight & Mass Converter — Convert between kilograms, pounds, ounces, stones, tonnes and grams.
• Weighted Average Calculator — Average values where each carries a different weight or importance.
• Weighted Grade Calculator — Combine assignment categories by their syllabus weights into a course grade.
• Wire Size Calculator — Estimate cable cross-section from voltage drop and load — a planning figure, not a compliant selection.
• Z-Score Calculator — Convert a value to a z-score and find its percentile in a normal distribution.