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Measured on six things

Free TDEE calculator that estimates maintenance calories, weight loss targets, muscle gain calories, and macro recommendations based on your body stats and activity level.

Growth

No GitHub repo found for tdee.io. Minimal community mentions; searches surface unrelated mobile apps. Appears early-stage or low-traffic niche site.

Screenshots

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TDEE Calculator

About this app

Free TDEE calculator that estimates maintenance calories, weight loss targets, muscle gain calories, and macro recommendations based on your body stats and activity level.

Key features

1Mifflin-St Jeor BMR + activity multiplier for TDEE
2Calorie targets for maintenance, loss, and muscle gain
3Macro recommendations based on inputs

Scout Review

Written by AI from measured evidence, scored out of 100.

A competent but unremarkable free TDEE estimator that gets the core math right using proven equations. Strong for simplicity and zero cost, weak on depth, engagement, and visibility. Suitable for casual users needing quick numbers, not serious fitness tracking.

Measure by measure

Usability

Straightforward inputs, instant calculation, copy/share buttons. Imperial/metric toggle. No accounts, tracking, or saved profiles. Mobile-friendly form but basic.

Design

Basic single-page layout with form inputs for age/gender/height/weight/activity. Uses Mifflin-St Jeor; results show calories/macros. Heavy text content, minimal visuals or modern styling.

Speed

Instant client-side calculation using standard equation. No benchmarks or performance data available. Loads quickly as static-ish site.

Security

Basic HTTPS assumed. No published audits, bug bounties, or advanced auth mentioned. Simple public tool with no user accounts.

Accessibility

Standard HTML form inputs. No WCAG docs or screen-reader testing mentioned. Mobile support via responsive design but nothing advanced.

Growth

No GitHub repo found for tdee.io. Minimal community mentions; searches surface unrelated mobile apps. Appears early-stage or low-traffic niche site.

Improvement areas

Lack of user accounts or progress tracking
Minimal visual design and result presentation
No GitHub presence or community engagement

Design & Usability

TDEE.io delivers a no-frills web calculator focused on Mifflin-St Jeor BMR + activity multiplier for TDEE, weight targets, and macros. The interface is functional for quick estimates but buried under excessive explanatory text that bloats the page. It handles basic inputs well with unit toggles and result sharing, yet lacks any polish, visualizations, or user accounts that modern tools provide.

Speed & Security

Performance is solid for a lightweight tool with instant results, though no independent benchmarks exist. Security is adequate for a public calculator with no stored user data, relying on standard web practices without audits or advanced features. Overall reliable for one-off use but nothing enterprise-grade.

Accessibility & Growth

Accessibility is average with responsive forms but no documented WCAG compliance or testing. Growth appears limited—no visible GitHub activity, community, or mentions specific to tdee.io, placing it as an early or low-visibility option versus established competitors.

Conclusion

If you're hunting for a dead-simple calorie estimator without logins or upsells, tdee.io does the job. Just don't expect innovation or community—it's a calculator, not a platform.