Free training calculators
Run the numbers. Plan what comes next.
Estimate working weights, load the bar, plan warm-ups, set macros and heart-rate zones, and compare weekly training load. Free to use. No account required.Tool workbench
Find the right tool for the decision.
Open a calculator for the training question in front of you. Every tool is free to use.Strength and loading
Estimate strength, compare relative performance, and put the right plates on the bar.
Plan the session
Turn top sets and effort targets into practical warm-up and loading guidance.
Fuel and conditioning
Estimate nutrition targets, heart-rate zones, and week-over-week session load.
No account required
Open any calculator and use it without creating a Fitflux account.
Clear inputs and results
Each tool explains what to enter, what the result means, and where the estimate has limits.
You decide what comes next
Use the output as a planning aid alongside performance, recovery, and context.
Beyond the calculator
Keep the decision connected to the client.
The calculator gives you a starting point. Fitflux keeps programming, readiness, progress, messages, and follow-up around the same coaching relationship.