One Rep Max Calculator : Free Online Fitness Calculator

v1.0

Calculate theoretical 1RM maximum strength across seven validated scientific equations (Epley, Brzycki, Lander, Lombardi, Mayhew, OConner, Wathan).

Unit:

One Rep Max (1RM) Calculator

Estimate maximum strength across validated Epley, Brzycki, and Lander formulas.

Lift Performance

Percentage Load Targets:

95% (~2r)

109 kg

90% (~4r)

104 kg

85% (~6r)

98 kg

80% (~8r)

92 kg

75% (~10r)

86 kg

70% (~12r)

81 kg

Estimated 1RM

Consensus 1 Rep Max

115 kg

Epley Equation:117
Brzycki Equation:113
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Sobre e como funciona

Discover how One Rep Max Calculator executes your workflow locally in your browser with zero server uploads and total privacy.

One Rep Max Calculator on Neranjan Tools is an ultra-fast, client-side utility crafted to deliver professional-grade processing without the privacy risks or upload delays of traditional cloud services. Whether handling sensitive business contracts, personal photos, or code snippets, you can accomplish your task in seconds.

Unlike conventional web converters that upload your confidential files to remote third-party servers, this tool operates 100% inside your browser's local sandbox using HTML5 Canvas, WebAssembly, and modern JavaScript engines. Your files are loaded into your device's memory, processed instantly by your local CPU and GPU, and saved directly to your disk, ensuring zero data leaks, zero server logging, and immunity to malware execution.

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Zero armazenamento no servidor

Files never leave your device. Complete immunity from server breaches or data leaks.

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Desempenho instantâneo

Immediate processing powered by your local device hardware with zero upload wait times.

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Compatível com todos os dispositivos

Works smoothly on iOS, Android, macOS, Windows, and Linux across all modern browsers.

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100% gratuito para sempre

No hidden subscriptions, no credit card forms, and unlimited free daily usage.

Garantia de privacidade 100% no lado do cliente

Neranjan Tools guarantees that One Rep Max Calculator processes your data purely in your browser memory. We never store, log, or inspect your files, protecting you fully against virus uploads and data breaches.

Ajuda e Base de Conhecimento

Perguntas frequentes (10)

Perguntas e respostas comuns sobre esta ferramenta.

Sets between 2 and 5 reps provide the most accurate 1RM estimations. Above 10 reps, fatigue and metabolic endurance skew predictions.
Yes! One Rep Max Calculator is completely free on Neranjan Tools with zero usage limits. You can process as many calculations, files, or transformations as you need without creating an account, paying for subscriptions, or entering payment details.
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Versão atual: v1.0
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