Free Unit Converter
Convert length, weight, temperature, volume, speed, time, digital storage, energy and more instantly in your browser.
inches
1 cm = 0.3937 in
Popular conversions
Conversion categories
Length
mm, cm, m, km, in, ft, yd, mi
Weight & Mass
mg, g, kg, t, oz, lb, st
Temperature
°C, °F, K
Area
mm², cm², m², ha, km², in², ft², yd², ac
Volume
mL, L, m³, cup, US fl oz, US cup, US pt, US qt, US gal, UK fl oz, UK pt, UK qt, UK gal
Speed
m/s, km/h, mph, kn
Time
ms, s, min, h, d, wk
Digital Storage
bit, B, kB, MB, GB, TB, PB, KiB, MiB, GiB, TiB, PiB
Energy
J, kJ, cal, kcal, Wh, kWh
Power
W, kW, hp, PS
Why Zunqari?
- Free
- Every converter is free to use, as often as you like.
- Fast
- Results update as you type. There is nothing to submit and no page reload.
- No signup
- No account, no email address, no login wall.
- Works in your browser
- Nothing to install. Open the page and start converting.
- Mobile friendly
- Large inputs and buttons that are easy to use with one thumb.
- Private
- Calculations happen on your device. The numbers you enter are never sent anywhere.
Frequently asked questions
Is Zunqari free?
Yes. Every converter is free to use, with no account, no signup and no usage limit.
Are my conversions sent to a server?
No. All calculations run in your browser on your own device. The numbers you type into a converter are not sent to Zunqari or anyone else.
How accurate are the results?
The converter uses the official definitions of each unit, such as 1 inch = 2.54 cm and 1 pound = 0.45359237 kg, and calculates with full double precision. Results are then rounded for display. Choose 2, 4 or 6 decimals if you need a fixed number of decimal places.
What does the “Auto” precision setting do?
Auto shows up to 4 decimal places for numbers of 1 or more, and 4 significant digits for numbers smaller than 1, so tiny results such as 0.0003937 stay readable. Very large or very small numbers are shown in scientific notation, such as 1.5e+18.
Can I type a comma as a decimal separator?
Yes. “2,5” is read as 2.5. A comma between groups of three digits, as in “1,000” or “12,500.75”, is read as a thousands separator.