Unit Rate Calculator: Find the Best Deal

The math behind "which is the better deal"

Unit rate = price ÷ quantity, so a lower number always means a cheaper price per unit — regardless of package size or total cost. The calculator computes rate 1 (value1 ÷ unit1) and rate 2 (value2 ÷ unit2) independently and compares them.

Worked example

Say a 3 lb bag of rice costs $12, and a 6 lb bag costs $20. Enter 12 and 3 for the first pair, 20 and 6 for the second. The tool returns Rate 1: $4.00 per unit and Rate 2: $3.33 per unit, then declares Rate 2 is the better deal! — even though the larger bag costs more in total, it's cheaper per pound.

What "unit" means here

The calculator doesn't know or care what the unit is — pounds, ounces, liters, rolls, count. It just divides value by quantity, so both sides of the comparison need to be measured in the same unit for the comparison to mean anything (comparing $/lb against $/kg would give a misleading answer).

Common uses

Grocery unit pricing (price per ounce/pound), gas prices at different pump sizes, bulk-buy comparisons, and subscription tiers priced per seat or per month are all the same underlying calculation: divide, then compare.