Every set.
One clear calculation.

Volume load is an arithmetic summary

This tool calculates the sum of weight × repetitions across the rows you enter. The result is expressed in kg·reps or lb·reps. It is often called tonnage, but it is not a measurement of mechanical work in joules, calories, muscle growth or effort.

Decide which sets belong in your comparison. If you include warm-up sets in one session, include the same category in the other or explain the difference. The tool totals the rows you provide; it does not reproduce an undocumented app statistic.

When repetitions change, add the actual sets

At 50 kg for 8, 8 and 6 repetitions, the total is 50 × 8 + 50 × 8 + 50 × 6 = 1,100 kg·reps. Multiplying 3 × 8 × 50 would produce 1,200 and overstate what you recorded. If the final weight changes too, update that row rather than using an average weight.

Compare similar records

Keep exercise identity, units and weight conventions consistent. Two different machines with “50” on the stack are not necessarily comparable. A dumbbell number recorded per hand cannot be directly compared with a combined-pair number. For bodyweight movements, zero external load does not mean zero exercise; this simple tool does not model body mass or assisted resistance.

A higher total is not automatically a better workout. Use the individual sets and notes to understand the result. These examples explain bookkeeping rather than how much to train.