Unit Converters
48 free online calculators — instant results, no sign-up
All 48 Unit Converters Tools
Length Converter
Meter, cm, km, inch, foot, nautical mileWeight Converter
Kilogram, jin, pound, ounceArea Converter
Square meter, mu, hectare, square footVolume Converter
Liter, milliliter, cubic meter, gallonTemperature Converter
Celsius, Fahrenheit and KelvinSpeed Converter
m/s, km/h, mph and knotsTime Unit Converter
Seconds, minutes, hours, days, weeks, months, yearsData Storage Converter
B, KB, MB, GB, TB, PBPressure Converter
Pa, kPa, MPa, bar, atm, psiPower Converter
W, kW, MW and horsepowerAngle Converter
Degrees, radians and gradiansFrequency Converter
Hz, kHz, MHz, GHzFuel Consumption Converter
L/100km ↔ MPGEnergy Converter
Joule, calorie, kWh and BTU conversionsRing Size Converter
Circumference/diameter to HK, US, EU and JP sizesRoman Numeral Converter
Arabic numbers to Roman numerals and back (1-3999)Screen PPI Calculator
Pixel density, dot pitch and Retina viewing distanceScreen Size Calculator
Diagonal inches to width/height cm, 16:9/4:3/21:9Photo Print Size Calculator
Pixels and dpi to printable inches and cmPaper Size Converter
A/B/C series in mm and inches with areaShoe Size Converter
Foot length to CN/EU/US/UK/JP sizes with full chartCooking Measurement Converter
Grams ↔ ml ↔ cups/spoons by ingredient densityTire Size Calculator
Tire code to diameter, sidewall and speedometer errorLumens to Watts Converter
Brightness across incandescent, halogen, CFL and LEDBra Size Converter
Bust/underbust to CN/UK/EU/US sizesAWG Wire Gauge Converter
AWG to mm², diameter, ampacityCoordinate Format Converter
DD, DMS and DDM latitude/longitudeAltitude Pressure Converter
ISA standard atmosphere, boiling point, oxygenTire Pressure Converter
bar/psi/kPa, vehicle recommendationsTV Viewing Distance Calculator
Size ↔ distance, 4K/1080pCoffee Ratio Calculator
6 brew methods, 3 modesHardness Converter
HRC/HB/HV, tensile strengthChinese Units Converter
Mu/jin/chi/li ↔ metric unitsHorsepower Converter
kW ↔ PS/HP, BTU/h, car referenceFlow Rate Converter
m3/h · L/s · GPM · CFMMap Scale Calculator
Map ↔ real distance · scale simplifierEngine Displacement Calculator
bore × stroke × cylindersAbsolute Humidity Converter
temp + RH → g/m³ via MagnusBelt Length Calculator
open drive 2C + π(D+d)/2Parcel Insurance Calculator
SF/JD rate table · fragile upliftCarton Sheet Cost Calculator
0201 blank area × board priceFabric GSM Converter
Convert oz/yd² and g/m² fabric weightsFuel Energy Converter
Convert coal equivalent, gas, electricity, MJ and kcalCups to Grams
Baking cup-to-gram conversion for 12 ingredientsOven Temperature Converter
Celsius, Fahrenheit and Gas MarkBed Size Converter
Bed width to US/EU sizes and linen dimsSpoon to Gram Converter
Tablespoon/teaspoon to ml and gramsBandwidth Converter
Convert Mbps to real MB/s download speed and estimate file download time.Related Guides
Car On-Road Price: The 6 Fees Beyond the Sticker
On-road price = sticker + purchase tax (10% of net price) + insurance + registration + extras. A ¥150k car lands at ~¥168k. Covers each fee's formula, new-energy exemptions, and the dealer add-ons you can refuse.
Jin to Kilograms: Chinese Weight Units Explained
1 jin = 500 g = 0.5 kg; 1 kg = 2 jin. 1 liang = 50 g (10 liang = 1 jin). Grocery prices in jin: ¥8/jin apples = ¥16/kg. Includes the old 16-liang jin, regional variants (Hong Kong jin = 604.8 g), and quick price conversion.
Mu to Square Meters: Land Area Conversion Guide
1 mu = 666.67 m²; 1 hectare = 15 mu; 1 km² = 1,500 mu; 1 acre ≈ 6.07 mu. A 100 m² apartment plot = 0.15 mu. Includes the historical definition (60 square zhang), farmland context and fast mental conversion.
Cooking Measures: Tsp, Tbsp, Cup & Gram Conversions
1 tbsp = 3 tsp = 15 mL; 1 cup = 16 tbsp = 240-250 mL. Water 1 cup ≈ 240 g, flour 1 cup ≈ 125 g, sugar 1 cup ≈ 200 g — volume-to-weight depends on density. Full ingredient table and the scoop-vs-spoon accuracy debate inside.
Tile Quantity Calculator: Coverage, Waste & Box Math
Tiles needed = area ÷ tile area × (1 + waste 5-15%). 20sqm floor with 600×600mm tiles: 20 ÷ 0.36 × 1.08 ≈ 60 tiles. Covers waste rates by pattern, box rounding, and the extra-box rule for future repairs.
Number Base Conversion: Binary, Octal, Decimal & Hex
Binary 1011 = 1×8+0×4+1×2+1 = 11 in decimal. Decimal→binary: divide by 2, read remainders upward (13 → 1101). Hex uses 0-9,A-F: 255 = FF. Octal groups bits by 3, hex by 4. Includes conversion tables and programmer tricks.