Tonnage calculator: total the load of a workout
How to use it
Enter one row per exercise: sets, reps per set and weight. The calculator multiplies the three values and adds the results across all rows: tonnage = Σ (sets × reps × weight). Tonnage and volume load are the same number under two names; this page uses both.
Choose one method and use it consistently when you compare sessions:
- You can leave warm-up sets out. This keeps the comparison focused on working sets. If you include warm-ups, include them every time.
- Treat bodyweight exercises as estimates. Body mass is not the actual load in every movement. It can be a rough reference for pull-ups; for push-ups and similar exercises, use a consistent fraction of body mass or track the reps separately.
If sets within an exercise differ in load, split them into separate rows: "Squat 1 × 5 × 100" and "Squat 3 × 8 × 80".
A quick example
Four sets of eight squats at 80 kg give a tonnage of 2,560 kg. Add the result for each exercise to get the session total.
That total becomes useful when you compare it with a similar session for the same client. It is much less useful when the exercises or technique have changed.
Tonnage, volume load and training volume
Coaches and researchers do not always use these terms in the same way, so it helps to state the definition.
On this page, tonnage and volume load both mean the sum of weight × reps × sets — the number this calculator produces. We use training volume for the number of working sets per muscle group each week. Other sources use different definitions, so check what an author is counting before comparing programs.
A client can add light-weight reps and increase volume load without adding a set. They can also move to a heavier weight for fewer reps, lower the volume load and still become stronger.
Volume load describes the external load recorded in a session. It cannot tell you on its own whether the training stimulus was appropriate.
What the number will not tell you
It does not distinguish exercises. The same load, reps and sets in two different movements produce the same number even when the demands are very different. It also ignores proximity to failure, range of motion and tempo.
It is also a poor direct comparison between clients because body mass, experience, technique and exercise selection all affect the result.
Use volume load to compare similar sessions for the same person. Look at several sessions rather than one result, and treat a flat trend as a reason to check load, reps, RIR, technique and recovery — not as proof that progress has stopped.
When manual totals become a chore
One session is easy enough to total by hand. The work grows when you need to keep several client records current and compare the same exercises over time.
FitLinkPro records sets during the session, calculates volume load and updates each exercise chart automatically.