Converters calculators

Free converters calculators with formulas shown on every page.

• Torque calculatorN·m, ft·lb, in·lb. Moment, not force.
• Newton Meters To Ft lb calculator1 N·m ≈ 0.737562 ft·lb.
• cm To Feet calculatorHeight: feet plus leftover inches.
• Feet To cm calculatorft + in → cm.
• Meters To Feet calculator1 m = 3.28084 ft, with leftover inches.
• kg To Stone calculatorUK body mass: stone plus leftover pounds.
• Watts To Amps calculatorI = P / (V × PF). AC can change power factor.
• Gallon Water Weight calculatorPure water at 4°C: 1 L = 1 kg. US gallon ≈ 3.785 kg.
• Cubic Yards To Tons calculatorVolume × bulk density. Water, gravel and concrete do not share one factor.
• Gallons To Pounds calculatorVolume × density. Pure water at 4°C: 1 US gal ≈ 8.345 lb.
• Liters To Tons calculatorWater: 1000 L = 1 metric tonne. Density is editable.
• Sqft To Cubic Feet calculatorArea × height. No height, no volume.
• Sqft To Cubic Yards calculatorArea × height, then ÷ 27.
• Amps To Watts calculatorP = I × V × PF. AC can change power factor.
• Hertz To Seconds calculatorPeriod T = 1/f. 50 Hz → 0.02 s.
• Lumens To Watts calculatorW = lm / (lm/W). Efficacy is an input; there is no single factor.
• Number Base calculatorBinary, octal, decimal, hex.
• Resistor Color calculatorTwo digits × multiplier from the colour bands.
• Ascii Table calculatorPrintable 32–126.
• Rgb Hex calculatorWeb color both ways.
• Dbm Watts calculatorP(dBm) = 10 log10(P/1mW).
• Awg Wire calculatorDiameter and area from AWG.
• Rgb Cmyk calculatorScreen RGB to print CMYK.
• Cubic Feet To Gallons calculator1 ft³ ≈ 7.48052 US gallons.
• Gold Weight calculatorTroy ounce is 31.1034768 g, not the avoirdupois ounce.
• Inch Pounds To Ft lb calculator12 in·lb = 1 ft·lb. Torque, not force.