Build a personalized RPE chart from your 1RM, 4RM, and 8RM — based on the RTS methodology.
RPE (Rate of Perceived Exertion) is a scale used in powerlifting to measure how hard a set feels relative to your maximum. An RPE 10 means you gave everything — no reps left. RPE 9 means one rep left, RPE 8 means two, and so on. An RPE chart maps rep counts to percentages of your 1RM, letting you plan training loads without constantly testing your max.
Standard RPE charts use population averages, but every lifter's strength endurance curve is different. By measuring your actual 1RM, 4RM, and 8RM, this tool builds a chart tailored to how your strength drops off across rep ranges — giving you more accurate load prescriptions and better estimated maxes.
Based on the RTS (Reactive Training Systems) approach by Mike Tuchscherer. Linear interpolation is applied across three rep range sections (1→4 RM, 4→8 RM, 8+ RM) to fill the full chart.