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Rate Formula Reference
Quick formulas for speed, work rate, density, and other quantity-per-unit relationships.
Speed, distance, and time
Distance = speed × time. Speed = distance ÷ time. Time = distance ÷ speed.
Work, rate, and time
Work = rate × time. Rate = work ÷ time. Time = work ÷ rate.
Density, mass, and volume
Density = mass ÷ volume. Mass = density × volume. Volume = mass ÷ density.
Unit rate
Unit rate = total quantity ÷ number of units. Keep units compatible before applying a formula.
How this resource works
Rate relationships express one quantity per unit of another. Rearranging the same multiplicative relationship solves for different unknowns.