TDEE calculator form for fitness coaches

Try it yourself

This is a real, working CalcForms calculator, right here on the page. Enter your details and watch the estimate update on the spot. It is exactly what your customers would use, and every submission lands in your dashboard as a lead.

forms.badabingapp.cc/tdee-calculator

What it calculates

Mifflin-St Jeor BMR with your own activity multipliers and goal calorie delta
Protein, carbs, and fat split set to your exact coaching philosophy
Client sees their numbers live, so more of them convert to a consult
Stop DM-ing screenshots of a Numbers file to every new lead
Pre-calculated lead with email lands in your dashboard, ready to follow up

Why it closes more deals

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A live number closes deals

Customers who see a real estimate the second they enter their details are far likelier to book than ones told to call for a quote. The number is the hook.

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Runs your most complex spreadsheet

Multi-tab workbooks, lookup tables, tiered rates, conditional line items, the lot. If the math runs in Excel, CalcForms runs it behind a clean form.

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Update it by chatting

Prices move. Ask ChatGPT to change a rate, add an option, or insert a step and the live form updates in seconds. No developer, no redeploy.

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Backtest before you publish

Run your last 20 real jobs through it and tune the formula until the live estimate matches what you actually charge. Ship it once it lines up.

Why calculator forms convert — by the numbers

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47.3% vs 2.8%

In an analysis of 50,000+ forms, interactive forms averaged a 47.3% conversion rate versus 2.8% for static forms. (Outgrow)

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2× conversions

Interactive content generates roughly twice as many conversions as static content. (Content Marketing Institute)

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51% of buyers

51% of B2B software buyers now begin their research in an AI chatbot rather than a search engine. (G2, 2026)

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1 in 3

A third of B2B buyers have chosen a vendor they had never heard of before, on an AI assistant's recommendation. (G2, 2026)

How this form was built

No template builder and no code. One message to ChatGPT with CalcForms added:

✦ ChatGPT with CalcForms

Build a TDEE calculator form. Inputs: weight in pounds, height in inches, age, sex, activity level (sedentary, light, moderate, very active, athlete), goal (cut, maintain, lean bulk). Calculate BMR with Mifflin-St Jeor, multiply by my activity factors (1.2 to 1.9), adjust 500 calories for the goal, then split into 1.0g protein per pound, 25% fat, rest carbs. Show the client calories and macros live. Capture their email.

Done. I built TDEE Calculator with your pricing and deployed it to forms.badabingapp.cc. The math runs server-side and every submission is saved with the inputs and email. Want to add a field or change a rate? Just tell me.

Build this exact form

CalcForms is an app you add to ChatGPT once. After that you build and edit forms just by chatting. Works in Claude too.

Add CalcForms to ChatGPT. Open the CalcForms app page, click Add, and sign in with your email. One time, about 60 seconds. A free ChatGPT account works. (Using Claude? Setup here.)
Say the words below. ChatGPT builds the form with your math inside and gives you a link.
Share it, then change it by asking. Send the link to customers. Change a rate or add a question later just by asking.

Step-by-step: turn your spreadsheet into a form, add your price list, show customers one number. All guides →

Say this to ChatGPT

"Build a TDEE calculator form. Inputs: weight in pounds, height in inches, age, sex, activity level (sedentary, light, moderate, very active, athlete), goal (cut, maintain, lean bulk). Calculate BMR with Mifflin-St Jeor, multiply by my activity factors (1.2 to 1.9), adjust 500 calories for the goal, then split into 1.0g protein per pound, 25% fat, rest carbs. Show the client calories and macros live. Capture their email."

Example run: A 165-pound, 70-inch, 32-year-old male at moderate activity on a cut sees 2,450 calories, 165g protein, 68g fat, and 280g carbs the moment he finishes the form.

How does it work? CalcForms is an official ChatGPT app. Once it is added, ChatGPT can build, publish and update real calculator forms for you, all from the chat window. Your customers never need ChatGPT; they just open a link.

What it works out

Daily calorie needs
Activity level
Goal adjustment
Protein target

FAQ

Can I use my own activity multipliers and macro split?

Yes. Tell ChatGPT your exact factors, like 1.55 for moderate and 1.2g protein per pound at 30% fat. It writes the formulas. If your method changes later, you adjust the form by chatting and the URL stays the same.

Does the client see their result, or just me?

They see calories and macros live, which is what turns a curious visitor into a booked call. You keep any internal coaching notes private. You choose per field what shows.

Can I gate the macros behind an email?

Yes. Make email required so the full split only appears after they submit. Every pre-calculated lead lands in your dashboard so you can follow up while they are still motivated.

Does it handle metric units?

Yes. Add a kg and cm toggle as an input, or build a separate metric version. ChatGPT handles the conversions inside the formula.

Build yours in the next 10 minutes.

Your first form is free. No credit card.

Add to ChatGPT, free →