Unit converter
Convert 10 km to miles, 70 kg to lb or 20 °C to °F across length, mass, area, volume, speed, time and temperature units.
- Runs in your browser
- No upload
- Instant result
Assumptions & formula
Formula and assumptions
y = x × f₁/f₂; K = °C + 273.15; °F = °C × 9/5 + 32
Results
Enter values and press Calculate to see the result here.
How to use this calculator
- Set inputs and units
Enter a value and compatible source and destination units. Temperature conversions include offsets.
- Calculate
Check this worked example: 1 mi → 1609.344 m; 0 °C → 32 °F
- Results
Read the destination unit together with the number. Swapping the units reverses the direction of the conversion.
Questions and limits
Can I convert length into area?
No. Both units must belong to the same dimension. Turning a length into an area needs a separate geometric calculation.
Which input errors should I correct?
Choose units from one group. Temperatures below absolute zero are rejected.
What does this calculation leave out?
Fixed unit factors only. This isn't for currencies, live rates or density conversions that depend on the material.