Free online strength calculators

Estimate 1RM, calculate strength ratios, measure your dynamic strength index, load velocity profile and more.
All available to use online for free, no sign up or registration required.

1RM estimation calculator

Automatically estimate your one rep max on any exercise using seven scientifically validated formula.
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1RM warmup calculator

Going for a max effort set? Use this calculator to find the ideal warm up weights and reps before your attempt.
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Load velocity profile

Generate a load-velocity profile from your training to estimate 1RM, track progress and more from your barbell velocity data.
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RPE 1RM calculator

Convert any weight and RPE combination into a complete RPE chart and 1RM estimate. Includes options for including bar speed.
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RPE - last rep velocity converter

Find the last rep velocity that matches with each RPE value on your lifts. Ideal for lifters using VBT and RPE in their program.
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DSI - Dynamic strength index

Measure the relationship between your explosive potential and your maximum force production.
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Strength standards calculator

Enter your best weights and see how you stack up against elite lifters for these same movements.
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Strength ratios calculator

Compare your best weights across the key barbell lifts to see which movements are your strongest and which might be lagging.
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Free Velocity based training resources

Want to explore VBT further and leverage it in your training?

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Elevate Your Training with Metric VBT

Maximise your workout effectiveness by monitoring key metrics like velocity, power, range of motion and tempo with just your smartphone.

Metric VBT automatically calculates your 1RM from bar speed data, along with bar path tracking, RPE logging and a full workout builder.

Metric is the perfect lifting app to refine your technique and enhance your strength.

Download it on iOS today.

App Store download logo for Metric VBT