Convert anything, instantly.
Free instant converters for length, weight, temperature, currency, color, code, BMI, and more — 745 tools across 24 categories. No signup, no clutter.
Browse by category
408 converters across 22 categories
Length
56 convertersmm, cm, m, km, inches, feet, miles
Weight
30 convertersg, kg, ton, oz, lb, stone
Temperature
6 convertersCelsius, Fahrenheit, Kelvin
Volume
56 convertersmL, L, gallon, fl oz, cup, tbsp
Speed
12 converterskm/h, mph, m/s, knot
Time
30 convertersseconds, minutes, hours, days, years
Pressure
30 convertersPa, kPa, bar, atm, psi, mmHg
Energy
30 convertersJ, kJ, cal, kcal, Wh, kWh, BTU
Power
12 convertersW, kW, hp, PS, BTU/h
Data size
30 convertersbit, byte, KB, MB, GB, TB
Torque
20 convertersN·m, lb-ft, kgf·m
Number bases
12 convertersbinary, octal, decimal, hexadecimal
Color
12 convertersHEX, RGB, HSL, HSV with live swatch
Code tools
9 toolsBase64, URL, JSON↔YAML, case, JWT, UUID, hash, lorem, word counter
Currency
50 pairs · liveUSD, EUR, GBP, TRY, JPY, +25 more — ECB rates, hourly refresh
Image format
6 convertersPNG ↔ JPG ↔ WebP — browser-only, no upload
Health
3 toolsBMI, BMR & TDEE, body fat %
Design
2 toolsAspect ratio, DPI / PPI
Date & time
3 toolsAge, date difference, working days
Cooking
1 tool · 36 ingredientsCup ↔ grams per-ingredient density
Fuel economy
1 toolMPG ↔ L/100km ↔ km/L (inverse-aware)
Sizes
1 toolShoe size — US, UK, EU, JP, cm
AI tools
1 toolToken counter & API cost calculator