FYL
1RM Calculator
Estimate your one-rep max from any hard set — no max-out required. Five proven formulas (Epley, Brzycki, Lombardi, O'Conner, Wathan) plus a %1RM loading table for percentage-based programming.
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Calculators
The math behind every hard set.
Each tool gives you the answer instantly and explains what to do with it — the same formulas FYL runs automatically on every set you log.
Training Volume Calculator
Total your session tonnage and working sets, then check your weekly hard sets per muscle against evidence-based ranges — the fastest way to sanity-check a program.
Open the calculator →Plate Calculator
Enter a target weight and bar, get the exact plates to load per side — kg or lb, biggest plates first. No more mental math between sets.
Open the calculator →Warm-Up Calculator
A plate-friendly ramp to any working weight — bar first, then 40/60/80/90% with falling reps, so you arrive at your top set primed instead of fatigued.
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Keep exploring
Plan the whole block, not just the set.
The calculators work best alongside the rest of FYL's free training library.
Exercise & Stretch Library
Browse 1,306 exercises by muscle or equipment, plus 78 static and dynamic stretches organized by target area.
Browse exercises → Browse stretches →Workout Programs
Complete, ready-to-run programs — Push/Pull/Legs, Upper/Lower, Full-Body and 5×5 — with schedules, sets, reps and progression rules.
See the programs →Compare Workout Trackers
How FYL stacks up against Hevy, Strong and the rest of the 2026 field — pricing, features and real limitations, checked against each app.
Read the comparisons →
Stop calculating. Start logging.
FYL runs every one of these numbers automatically as you train — estimated 1RM, volume and PRs on each logged set, free on iOS and Android.