Conversion Calculators

Convert between units of length, weight, volume, and more.

Convert BTU per hour (Btu/h) to watts (W) instantly using the standard conversion factor of 0.293071 watts per Btu/h.

Convert centimeters to inches using the exact 2.54 cm per inch factor. Free, fast, and accurate for any centimeter measurement.

Convert feet to inches instantly with this free calculator. Multiply by 12 for exact results. Handles decimal and whole-foot inputs.

Convert any measurement in inches to centimeters instantly. Uses the exact 2.54 cm per inch international conversion factor.

Convert fractional inches to decimal inches instantly. Enter whole inches, numerator, and denominator to get the exact decimal value.

Convert any measurement in inches to feet instantly with this free calculator. Uses the exact 12 inches per foot conversion factor.

Convert decimal inches to fractional inches with selectable precision (8ths, 16ths, 32nds, or 64ths). Perfect for tape measure readings.

Convert inches to meters quickly and accurately with this free calculator. Uses the exact international standard metric conversion factor.

Convert inches to millimeters using the precise 25.4 mm per inch factor. Essential for machining, 3D printing, and engineering work.

Convert inches to yards instantly with this free calculator. Uses the exact 36 inches per yard factor for precise results every time.

Convert meters to inches accurately using the standard conversion factor. Perfect for international specs and scientific measurements.

Convert millimeters to inches using the precise 25.4 mm per inch factor. Ideal for machining, engineering, and hardware specifications.

Convert watts to Btu per hour instantly using the standard conversion factor of 3.412142.

Convert yards to inches instantly with this free calculator. Multiplies by 36 using the exact 3 feet per yard and 12 inches per foot factors.

Work out exactly how much concentrate and water you need for any dilution ratio, plus the mix strength as a percent.

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles using exact international conversion factors.