Powerlifting numbers, done right
DOTS Calculator started from a simple frustration: most strength calculators online are slow, cluttered with ads before you even see a result, or quietly running outdated formulas. We wanted one place with every scoring and planning tool a lifter actually needs — DOTS, Wilks, Wilks 2, IPF GL, Sinclair, Glossbrenner, one-rep max, plate math, attempt selection, strength standards — built fast, built accurate, and free to use.
What we build
Every calculator on this site runs entirely in your browser. There’s no server round-trip waiting on your result, and your numbers never leave your device. We source every formula directly from the federation or research paper that publishes it — the IPF’s own Goodlift coefficients, the IWF’s Sinclair constants, the officially published Glossbrenner tables — rather than copying whatever another calculator site did. Where a formula is genuinely a rough guideline rather than an official standard (our Strength Standards charts, for example), we say so plainly instead of dressing up an estimate as gospel.
Why it’s free
DOTS Calculator is supported by advertising and, on some pages, affiliate links to gear or resources we think are genuinely useful (see our Affiliate Disclosure). Ads never appear inside a calculator’s input flow, and no advertiser has any say over which formulas we implement or how we explain them.
Our approach to accuracy
We’d rather ship fewer calculators correctly than more calculators approximately. Every formula on this site is checked against its original published source before it goes live, and we note our sources and any known limitations in each calculator’s guide. If you spot an error, we want to hear about it — see our Editorial Policy for how corrections work, or just get in touch.
Who this is for
Whether you’re a first-time lifter curious how your numbers stack up, a competitor picking attempts for Saturday, or a coach comparing lifters across weight classes, DOTS Calculator is built to get you a trustworthy number in seconds and get out of your way.