Online calculator & unit converter
Everyday numbers. Simply handled.
Calculator
Unit converter
Length
1 m ≈ 3.28083989501312 ft
24 digits maximum. Dot or comma for decimals; no thousands separators.
Other conversions
Results are rounded to 15 significant digits. Scientific functions are approximate.
On your deviceA few useful details
How do percentages and powers work?
% always divides by 100: 200 × 10% = 20, while 200 + 10% = 200.1. Use 200 × (1 + 10%) to add 10%. Powers come before a leading minus: -2^2 = -4. Use parentheses to change the order.
Which unit definitions are used?
Feet and miles are international units; ounces and pounds are avoirdupois. US liquid measures and Imperial gallons are distinct. Calories are thermochemical; hp is mechanical horsepower. Data uses kB = 1000 B and KiB = 1024 B. A day is 24 hours; variable-length months and years are not included.
Does it work offline?
After the “Ready offline” status appears, the calculator, conversions and all 19 languages work without a connection. Calculations stay on this device. Theme and language preferences are saved locally; history is kept only in this browser tab’s session.