The MMW Toolbox

Free Fight Tools

Round timers, calculators, quizzes and matchup tools for MMA, UFC and Brazilian Jiu-Jitsu. Everything runs in your browser — no download, no sign-up. Built on the mats by Meta Mat Warriors.

// Train

MMA Round Timer

A full-screen round timer for rounds, rest and prep — with a bell. Boxing, BJJ, Tabata and HIIT presets, custom rounds, runs offline in your browser.

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// Play

MMA trivia challenge

UFC Quiz

Twelve questions, one shot. Test your UFC and MMA knowledge across champions, records, finishes and history — then share your score.

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Daily Wordle-style game

Guess the UFC Fighter

A new mystery UFC fighter every day. Guess in six tries — each wrong guess reveals how close you are on division, height, reach, record and country.

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// Fight IQ

Fighter comparison tool

Tale of the Tape

Put any two UFC fighters side by side — height, reach, age, stance and record — and see who has the edge before they ever touch gloves.

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Head-to-head matchup model

UFC Fight Predictor

Pick two fighters and our model weighs reach, age, finishing rate and record to call a winner with a confidence score. Settle the debate.

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The meme, made real

MMA Math

If A beat B and B beat C, then A beats C… right? Build a chain between any two fighters and watch MMA math fall apart, gloriously.

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// Reference

Belt order & progression

BJJ Belt Ranks

The full Brazilian Jiu-Jitsu belt system in order — white to red — with stripes, typical time at each belt and what it takes to earn the next one.

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Find your division

Weight Class Calculator

Enter your weight and find your UFC, boxing and grappling weight class instantly — plus how far you are from the limit above and below.

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Free MMA, UFC & BJJ tools in your browser

The MMW Toolbox is a growing set of free, interactive tools for fight fans and martial artists. Time your rounds with the boxing and BJJ round timer, test your knowledge on the UFC quiz, or come back daily to crack Guess the UFC Fighter. Settle debates with the tale of the tape and our fight predictor, watch transitivity collapse in MMA math, learn the BJJ belt ranks, or find your division with the weight class calculator.

Want something more playful? The MMW Arcade has free fighting and grappling games too.