Browse the tool catalog - Health, Sports & Fitness | Elysia Tools

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Browse the tool catalog - Health, Sports & Fitness

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Focused on Health, Sports & Fitness.

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Images, Audio & Video507

Image, audio, and video processing, conversion, and optimization tools

Math, Date & Finance448

Calculators, numerics, date logic, statistics, and finance tools

Design & Color281

Color, layout, graphics, visual styling, and design helper tools

Text & Writing183

Writing, cleanup, formatting, extraction, and text analysis tools

Conversion & Encoding160

Format, file, archive, unit, and encoding conversion tools

Developer & Web150

Developer utilities, networking, web debugging, and automation helpers

Audio Encoding and Format Conversion Tools

Image Format Conversion and Animated Export Tools

JSON Interchange and Format Translation Tools

Color Space Conversion Tools for Web and Print

Text Case, Encoding, and Normalization Conversion Tools

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Health

Blood Alcohol Content (BAC) Estimator

Estimate your BAC from sex, weight, drinks and time using the Widmark formula. Returns g/dL and ‰, predicts sober time, and flags the impairment tier and legal driving limits.

Health

Fetal Development Timeline (by Gestational Week)

See week-by-week fetal development from conception to birth (40 weeks). Enter your LMP date or a known gestational age and the tool highlights the current week with size, weight and milestones.

Health

Lean Body Mass Calculator (Boer / Hume / James)

Estimate your lean body mass (LBM) from sex, age, weight and height using three clinical formulas side by side, with derived body-fat percentage.

Health

Macro Calculator (Carbs / Protein / Fat Split)

Convert a daily calorie target into grams of carbohydrate, protein and fat. Pick a preset split — balanced (50/30/20), low-carb (35/40/25), keto (10/20/70) or high-protein (40/35/25) — or define your own percentages.

Health

Running Pace Calculator (Distance / Time / Pace)

Solve for pace, finish time or distance given the other two. Enter a known distance and either a finish time or a pace, and get the missing value plus speed and optional Riegel race predictions.

Health

Sleep Calculator (90-Minute Cycles)

Find the best bedtime or wake time based on the brains 90-minute sleep-cycle rhythm. Enter a target wake time and get recommended bedtimes, or enter a bedtime to project forward.

Health

Biorhythm Curve Plotter

Plot the classic 23-day physical, 28-day emotional, and 33-day intellectual biorhythm sine curves around any target date. See today's cycle states, mark zero-crossing "critical days", and read a daily value table with a combined total — enter your date of birth and a target date.

Health

Sleep Debt Calculator

Calculate cumulative sleep debt across the last 7 to 14 nights and generate a gradual recovery plan

Health

Swimming Pace and Interval Builder

Convert swim benchmark times into 25m, 50m, and 100m pacing and generate CSS-style threshold intervals

Health

TDEE / BMR Body Composition Calculator

Estimate BMR, TDEE, ideal weight, and macro splits for weight loss, maintenance, or muscle gain

Health

Barbell Plate Load Calculator

Calculate a symmetric per-side plate setup for a target barbell weight, with kg/lb support and custom inventory

Sports

Running Pace & Heart Rate Zone Calculator

Predict race times, calculate heart-rate zones, and build pace conversion tables from a recent race result