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Each conversion uses the exact SI or customary ratio for its category — for example 1 inch = 25.4 mm, 1 kg = 1000 g — applied directly to the value you enter. Temperature is handled with its proper formulas rather than a single ratio, because its scales have different zero points.
This is for quick, practical swaps. It is not a calibrated instrument and is not legal-for-trade, and it does not apply significant-figure or measurement-uncertainty rules — round the result to the precision your task needs.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.
Convert Weight / Mass units with fixed conversion factors.
Convert Temperature units with fixed conversion factors.
Convert Area units with fixed conversion factors.
Convert Volume units with fixed conversion factors.
Convert Speed units with fixed conversion factors.
