Forex Lot Size Calculator
Convert between units, standard lots, mini lots, micro lots and nano lots.
Please note: Forex trading carries a high risk of loss, amplified by leverage. Exchange rates must be entered manually — no live market data is used.
What the Forex Lot Size Calculator does
Forex is traded in standardised lot sizes. A standard lot is 100,000 units of the base currency, with mini, micro and nano lots each a tenth of the one above. Lot size sets your pip value and therefore your risk per pip.
Formula
Units = Lots × Lot sizeStandard = 100,000 · Mini = 10,000 · Micro = 1,000 · Nano = 100
Inputs explained
| Input | Unit | Required | Notes |
|---|---|---|---|
| Amount | number | Yes | Accepts more than 0. |
| Unit | one of 5 options | Yes | — |
| Pair price | number | Optional | Optional — shows the notional value. Accepts 0 or more. |
| Pip size | one of 3 options | Yes | — |
| Currency | one of 10 options | Optional | — |
How to use it
- Choose Unit and Pip size.
- Enter Amount.
- Optionally add Pair price.
- Select Calculate.
Worked example
How many units is 0.35 standard lots?
- Amount
- 0.35
- Unit
- Standard lots
0.35 × 100,000 = 35,000 units, equal to 3.5 mini lots.
Frequently asked questions
What lot size should a beginner use?
Micro lots. At $0.10 per pip, a 50-pip loss costs $5 — small enough to learn from without serious damage.