Agriculture & Gardening20 tools Automotive21 tools Event Planning26 tools Fashion & Beauty22 tools
Category · Lifestyle Tools

Best free Health & Fitness Tools you can use right now

Work out BMI, daily calories, macros, water intake and heart rate zones, then build a week of sessions. Free health and fitness tools, no sign up.

Popular tags: Health Fitness Nutrition Workout Diet Wellness Bmi
46 Free Tools
100% Free Forever
1,405+ Tools Sitewide
Aug 18, 2026 Last Updated
AI Directory Companies Comparisons Alternatives Best-of Guides Use Cases Collections AI Tools AI Models AI Courses
46 tools found
Updating…
Sort tools by
Top Picks for You The tools our community reaches for most.
Explore by category

Browse More Lifestyle Tools

Every free tool on AIToolsay, sorted by the job it actually does.

View all tools

Agriculture & Gardening

Before the first seed goes in, work out the sowing dates, the bed spacing and the compost mix with f...

20 tools

Automotive

Write a used car listing, script a dealer negotiation or make sense of a repair quote with free auto...

21 tools

Event Planning

The words are the hard part. Free event planning tools write the toast, the invitation wording and t...

26 tools

Fashion & Beauty

Your wardrobe is full and you still have nothing to wear. Fashion and beauty tools settle the outfit...

22 tools

Gaming

Game masters and streamers come here for NPCs, campaign plots, Twitch titles and clan bios. Free gam...

22 tools

Home & DIY

Room layouts, paint palettes, remodel checklists and renovation budgets. Free home and DIY tools tha...

37 tools

Music

Stuck for a chorus, an album name or a bio for the press kit? Free music tools that hand you a draft...

20 tools

Parenting & Family

Baby names with meanings, bedtime stories, chore charts and homeschool plans. Free parenting and fam...

25 tools

Pets & Animals

Not sure how much to feed a puppy or what to leave the sitter? Pets and animals tools write the sche...

23 tools

Religion & Spirituality

Sunday prep and quiet time in one place. Free religion and spirituality tools for sermon outlines, B...

23 tools

Food & Recipes

Type in what is already in the fridge and get dinner. These food and recipes tools cover swaps, scal...

38 tools

Travel

Everything you sort out before a trip, the day plan, the packing list, the visa check and a few loca...

39 tools

Personal & Occasions

When the toast is tomorrow and nothing sounds right, the personal and occasions tools turn your roug...

7 tools
The free toolbox, explained

Why use AIToolsay Tools?

A working toolbox rather than a shop window — every tool runs here, in the browser, the moment you open it.

OUR PROMISE

Free Forever

Every tool on this page is 100% free — no signup wall, no trial clock, no credit card.

Organised by Job

Grouped by what each tool actually does, so "write my blog post" lands on the right one first.

Private by Design

Your text is processed for the result you asked for. Nothing is published and nothing is sold.

Fast & Simple

Paste, click, done. Every tool is one screen with no setup and nothing to learn.

No Registration

Open a tool and start typing. No account, no email, no password to remember.

Always Improving

New tools ship every week and the existing ones are retuned as the models get better.

Questions

Everything you wanted to ask

Quick answers about the tools in this category — what they cost, what they need and how they work.

Still have a question? We usually reply within one working day. Report Issues A broken tool or a missing page? Tell us. Submit your AI tool Add your AI tool to our directory.

What can these tools actually work out for me?
Body numbers and plans. The BMI Calculator, Calorie Needs Calculator, Macro Calculator and Water Intake Calculator handle the maths, while the Workout Plan Generator turns your goal and your free days into a week of sessions you can realistically keep to.

How does the Heart Rate Zone Calculator help my training?
It splits your range into easy, steady and hard zones so you know how fast to run or ride. Most people push too hard on easy days and too soft on hard ones, and seeing the numbers written down tends to fix that.

Is any of this medical advice?
No. The Symptom Explainer puts common terms into plain English and the calculators use standard formulas, but none of it replaces a doctor. Use the results as background before an appointment, and speak to a professional about anything that worries you.

Can I use these while pregnant?
The Pregnancy Due Date Calculator gives an estimated date from your last period, which is a useful rough guide. Anything about diet, training or symptoms while pregnant should go through your midwife or doctor, since needs change a lot from week to week.

Is there a paid version with more detail?
There is not. Everything here is free with no cost and no trial, and no account or sign up is needed. You can run the Macro Calculator on Monday, change your goal on Friday and run it again without hitting a limit.

What if I do not go to a gym?
Say so when the Workout Plan Generator asks. It builds around what you have, whether that is a park, a couple of dumbbells at home or nothing at all. Home plans lean on bodyweight moves and simple progressions you can add to each week.

Can I keep the plan it writes?
Yes. Results export in TXT, DOC and HTML with one click, so you can print the week and stick it on the fridge or drop it into a notes app. Sign in only if you would like the history kept for later.

Does the Sleep Cycle Calculator need an app?
No, it runs in the browser like everything else here. You give it a wake time and it works back through full sleep cycles so you know when to go to bed. There is nothing to install on phones, tablets or desktops.
Still have a question? We usually reply within one working day. Report Issues A broken tool or a missing page? Tell us. Submit your AI tool Add your AI tool to our directory.