Syrax tools

Calculators and planners that actually save you work

Free, no sign-up, with an open method. Your data stays in your browser.

Workout plan generator

12-week plan with deloads, volume check, log and PDF – matched to your stack

Supplement Stack Builder
Pick goals, get a stack with dosage, timing, interaction check and a weekly PDF plan
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Protein calculator
Daily target, amount per meal and a check against what you eat
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Creatine cost calculator
Price per 3 g, per month and year – powder, tablets, gummies
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Sweat rate calculator
Sweat rate, sodium loss and a drinking plan for your next session
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1RM & progression calculator
Estimate your max, percentage table and a progression plan with deload
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Shift work sleep optimizer
Sleep, naps, light, caffeine and meals around early, late and night shifts
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Open method
Every tool shows how it calculates and which sources it relies on.
No sign-up
Everything runs in your browser. Saving and sharing work without an account.
Honest, not sales-driven
We only recommend what's backed by evidence – even if we don't sell it.