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Sema Vatansever

Tools

The Tools section gathers the calculators and everyday helpers that turn what you learn on this site into your own numbers. Everything runs in your browser; the data you enter never leaves your device.

Pair the tools with Sport and Fitness Understand the nutrition tools' logic Explore the technology helpers Learn the concepts in the Academy Fit the tools into daily life with Smart Living

What kind of toolset?

The tools are grouped to complement the site's main sections: calculators for training and body measurements, nutrition and energy tools, technology and digital-life helpers, and small utilities that support your daily routine. Each tool works hand in hand with the content around it — you learn the concept in the Academy first, then see your own numbers in the tool.

Where is your data processed?

All calculations happen inside your browser; the values you enter — height, weight, dates — are not sent to any server. When a tool needs to remember your inputs, they are stored only in your browser's own storage on your device, and deleting them is entirely under your control.

How to interpret the results

The formulas behind the calculators are built on population averages, so a result is not your personal truth — it is a starting point. Two well-known formulas giving different results is normal, not a malfunction. Read every result as an estimated range, and for decisions that touch your health, rely on a professional's assessment rather than on a calculator alone.

Body and energy

Daily Calorie Needs Calculator

This tool presents your daily energy needs as an estimated range rather than a single number, and shows how different goal scenarios shift that range.

BMR Calculator

Your basal metabolic rate (BMR) is the energy your body spends on the vital functions it keeps going even at complete rest. This tool estimates a BMR value from your age,

TDEE Calculator

TDEE, or total daily energy expenditure, estimates the total energy you spend in a day by adding your daily movement and exercise on top of your resting metabolism.

Macro Split Calculator

This tool divides the daily energy figure you set between protein, carbohydrate and fat according to the percentages you choose, and shows what each share comes to in gra

Protein Range Calculator

This tool works out, in grams, the informational range cited in the literature for daily protein intake, based on your body weight.

Water Intake Planner

The Water Intake Planner starts from your body weight to show a practical opening range for fluid intake through the day, and turns it into a draft drinking schedule spre

Nutrition

Food Comparator

The Food Comparator places the foods you choose side by side over the same quantity, so you can compare their energy and macronutrient values on fair ground.

Recipe Nutrition Calculator

When you enter the ingredients of a recipe and their amounts, this tool works out the estimated energy and macronutrient values of the recipe in total and per portion.

Label Comparator

The Label Comparator converts the nutrition values on two products’ packaging to a common basis, giving a comparison free of portion tricks.

Sport and fitness

Exercise Readiness Check

The Exercise Readiness Check is a short pre-participation questionnaire that helps you notice whether you have any conditions calling for care before you start exercising

Weekly Exercise Planner

The Weekly Exercise Planner builds a balanced weekly movement draft from the number of days available to you, your goal and the types of activity you prefer.

Training Volume Calculator

The Training Volume Calculator works out the total load you have lifted from your sets, repetitions and weights, so you can follow the size of a session as a single numbe

Estimated 1RM Calculator

The Estimated 1RM Calculator estimates the heaviest weight you could lift for a single repetition, from the number of repetitions you can perform with a given weight on a

RPE–RIR Converter

The RPE–RIR Converter translates between the two common scales that describe training intensity: perceived exertion (RPE) and the number of repetitions left in reserve (R

Running Pace Calculator

The Running Pace Calculator works out your pace per kilometre from the time and distance you ran, and it also converts between a target pace and a finishing time.

Walk–Run Planner

The Walk–Run Planner produces a plan outline for people new to running, alternating intervals of walking and running and progressing gradually from week to week.

Everyday life

Life Balance Assessment

The Life Balance Assessment asks you to score how much room you are able to give to the different areas of your life — work, relationships, health, rest, personal growth

Sleep Time Planner

The Sleep Time Planner takes sleep cycles into account to suggest suitable bedtimes for the hour you want to wake, or suitable waking times for the hour you go to bed.

Screen Time Analysis

Screen Time Analysis is a self-assessment tool, free of judgement, that lets you review your daily screen use through questions about duration and context.

Desk Break Planner

The Desk Break Planner produces a draft of short movement and rest breaks placed through the day, based on your working hours and your routine.

Habit Builder

The Habit Builder turns a habit you want to take up into a small, trackable starting plan: a trigger, a small step and a way of following it.

Technology and security

Digital Security Check

The Digital Security Check is a self-assessment that lets you review your basic security practices, from password habits through to backups, with a short set of questions

Password Structure Check

The Password Structure Check assesses the length, character variety and predictable patterns of a password. The tool runs entirely in your browser; the password you type

Backup Plan Builder

The Backup Plan Builder clarifies where your data sit and how often they need backing up, and draws up a backup outline you can actually follow.

App Permissions Assessor

The App Permissions Assessor is an awareness tool that helps you think about how far the permissions an app on your phone asks for match what the app actually does.

Internet Speed Interpreter

The Internet Speed Interpreter explains what the Mbps figure from a speed test means for your everyday uses: what it is enough for, and where it will struggle.

Storage Needs Calculator

The Storage Needs Calculator gives an approximate estimate of how much storage space you will need, starting from your photo, video and other content habits.

Sky and reasoning

Moon Phase Visualiser

The Moon Phase Visualiser works out which phase the Moon is in on a date you choose and shows it visually; it works for past and future dates as well.

Precession Visualiser

The Precession Visualiser animates the slow wobble that the Earth’s rotational axis completes in roughly 26,000 years, and shows what it does to the map of the sky.

Retrograde Motion Simulator

The Retrograde Motion Simulator shows why a planet sometimes appears to move backwards across the sky, by animating the orbital motion of the Earth and Mars.

Barnum Effect Experiment

The Barnum Effect Experiment lets you experience for yourself why personality statements written to fit everyone give the feeling that “this describes me exactly”.

Blind Matching of Horoscope Readings

Blind Matching of Horoscope Readings is an experiment in which you try to pick out your own reading from a set with the labels hidden; your result is then compared with t

Astrological Prediction Journal

The Astrological Prediction Journal is a testing tool that lets you record the predictions you read before they come due, and score them coolly once their period is over.

Astrological Language Analyser

The Astrological Language Analyser marks the vague, fits-anyone phrasings in a reading you paste in, making the structure of the text visible. Your text stays in your bro

Claim Testability Check

The Claim Testability Check puts a claim you have come across through a short set of questions, so you can see whether it is a testable proposition or a statement no obse

Frequently asked questions

Do I need an account to use the tools?

No. No tool asks you to sign up; you open the page, enter your values and see the result immediately.

Is my data sent to a server?

No. Calculations run entirely in your browser. If a tool remembers your inputs, they live only in your device's browser storage, and you can delete them at any time.

How reliable are the results?

They are estimates based on general formulas and can vary from person to person. Treat them as starting points, and seek professional advice for health-related decisions.

First published: 2026-08-12Last reviewed: 2026-08-12Editorial status: working editionReport an error