Evidence-Based Strength Training Tools & Guides

Rate of Perceived Exertion (RPE) is an autoregulation method that lets lifters prescribe and track training intensity based on how hard a set actually felt — not just what a spreadsheet says the weight should be. Originally adapted from Gunnar Borg's 1-10 exertion scale, the RPE system used in strength training was refined by powerlifting coach Mike Tuchscherer and later validated by researchers like Eric Helms.

The core idea is simple: an RPE 8 set means you finished with roughly two reps still in reserve. RPE 9 means one rep left. RPE 10 means you gave everything. By rating each working set this way, you automatically account for daily fluctuations in sleep, stress, nutrition, and recovery — something fixed-percentage programs cannot do.

This matters because two lifters following the same "80% for 5 reps" prescription can have wildly different training experiences depending on the day. RPE-based programming solves this by letting the weight on the bar adjust to the lifter's actual readiness, not a theoretical number calculated weeks ago. The result is more productive training sessions, better fatigue management, and fewer missed reps.

If you're new to RPE, start with our guide on what RPE is and how it works, then learn how RPE compares to percentage-based training. For a deeper look at the science, read about autoregulation in strength training.

Whether you're a beginner picking your first program or an intermediate lifter looking to break through a plateau, understanding a few key concepts will make your training more effective. Progressive overload — gradually increasing the demands on your muscles over time — is the fundamental driver of strength gains. But how you manage that overload matters as much as the overload itself.

A good training program balances volume, intensity, and recovery. Too much volume without adequate recovery leads to stagnation or injury. Too little intensity and you never push your body to adapt. The calculators and guides on this site are designed to help you find that balance: use the 1RM calculator to set training weights, the TDEE calculator to dial in nutrition, and the macro calculator to get your protein, carbs, and fats right for your goals.

For a complete beginner roadmap, start with our beginner's guide to strength training programs. If you're already training and want to understand how to structure progress, read understanding progressive overload.

Every calculator on rpe.training is built on peer-reviewed formulas and established sports science standards — from the Tuchscherer/Helms RPE percentage table to the 2020 Wilks-2 and DOTS revisions. The tools are designed for lifters who want fast, accurate numbers between sets, not bloated apps behind paywalls.

All data stays on your device, all calculations run in your browser, and nothing requires an account or subscription. The site works offline as a progressive web app, so you can use it at the gym even without cell service. The guides go deeper on the science and programming concepts behind the numbers.

Built by Brandon Edmunds — a lifter who got tired of searching for simple training tools across a dozen different apps and spreadsheets.