Free calculators

Flesch reading ease calculator

Get your text's Flesch reading ease score from 0 to 100, what it means, and the sentences pulling it down.

Flesch-Kincaid calculator

Get your text's Flesch-Kincaid grade level, the US school grade needed to read it, and what to simplify.

Substack money calculator

What your paid subscribers earn after Substack's 10% and Stripe's fees.

X money calculator

What Original Content Rewards pay at your own rate, whether you qualify, and your deals.

beehiiv money calculator

What your beehiiv newsletter earns from paid subscriptions, the Ad Network and Boosts, after fees and your plan.

Engagement rate calculator

Any account's engagement rate by followers and by views, from a username or a link, against benchmarks for its size.

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Patreon money calculator

What your Patreon tiers earn after the platform fee, processing and payouts.

Twitch money calculator

What your subs, Bits and ads earn, with the split your Plus Points reach.

TikTok money calculator

What your views earn in the Creator Rewards Program at your own RPM, plus brand deals.

Instagram money calculator

What gifts, subscriptions and brand deals earn you on Instagram, after app store fees.

Facebook money calculator

What your views, Stars and brand deals earn on Facebook, at your own rates.

X money calculator

What Original Content Rewards pay at your own rate, whether you qualify, and your deals.

Sponsorship rate calculator

Price a sponsored post and a whole deal from your reach and your CPM, with a rate card.

Aspect ratio calculator

Simplify any size to its ratio, solve the missing side and see the frame drawn to scale.

Hex to RGB converter

Convert a hex color to RGB, HSL and CMYK, and check it against white and black text.

YouTube money calculator

What a YouTube channel or video earns from ads, from its real views and your RPM, with Shorts apart.

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YouTube Shorts money calculator

What YouTube Shorts earn from their real views and your Shorts RPM, with the Shorts pool explained.

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YouTube watch time calculator

When your channel reaches 4,000 and 8,000 watch hours, and where it stands on every Partner Program threshold.

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Twitch money calculator

What your subs, Bits and ads earn, with the split your Plus Points reach.

TikTok money calculator

What your views earn in the Creator Rewards Program at your own RPM, plus brand deals.

Aspect ratio calculator

Simplify any size to its ratio, solve the missing side and see the frame drawn to scale.

Podcast sponsorship calculator

What your podcast ads are worth per episode and per month, from published rates, with a rate card.

Value equation calculator

Score your offer on the 4 parts of Hormozi's value equation and find the change that raises it most.

LTV to CAC calculator

Compare what a customer is worth with what they cost to get, on gross profit, with payback and the first 30 days.

CAC payback calculator

See how long a customer takes to pay back what they cost to get, and whether the first 30 days cover it.

Freelance rate calculator

What to charge an hour, a day and a project to take home what you want.

Hourly to salary calculator

Turn an hourly wage into yearly, monthly and weekly pay, or a salary into hourly.

Substack money calculator

What your paid subscribers earn after Substack's 10% and Stripe's fees.

Patreon money calculator

What your Patreon tiers earn after the platform fee, processing and payouts.

beehiiv money calculator

What your beehiiv newsletter earns from paid subscriptions, the Ad Network and Boosts, after fees and your plan.

A/B test calculator

Find out if your A/B test has a real winner, and how many sends or visitors a test needs.

Value equation calculator

Score your offer on the 4 parts of Hormozi's value equation and find the change that raises it most.

LTV to CAC calculator

Compare what a customer is worth with what they cost to get, on gross profit, with payback and the first 30 days.

CAC payback calculator

See how long a customer takes to pay back what they cost to get, and whether the first 30 days cover it.

Podcast sponsorship calculator

What your podcast ads are worth per episode and per month, from published rates, with a rate card.

Email marketing cost calculator

See what every major email platform costs for your list, this month and over 12 months, from their own pricing pages.

Mailchimp pricing calculator

See what each Mailchimp plan costs for your contacts, with its send limits and the unsubscribed contacts it counts.

Sponsorship rate calculator

Price a sponsored post and a whole deal from your reach and your CPM, with a rate card.

Book royalty calculator

What you earn per copy at KDP, Apple Books, Kobo, B&N, Google Play and Audible.

KDP royalty calculator

Your Amazon KDP royalty for eBook, paperback and hardcover, with the price where it jumps.

Book profit calculator

When your book pays for itself: costs in, break-even out, at your own sales pace.

Book ROI calculator

What a book is worth to your business: royalties plus the clients it brings.

Book page count calculator

Your page count at a real trim, font and margins, with spine width and printing cost.

Words to pages calculator

How many pages your words make, in 10 book fonts and 6 trim sizes.

Book length calculator

How long bestsellers in your genre are, how your book compares, and when you'll finish.

Reading time calculator

How long pages, words, a text or a book take to read, at real reading speeds.

Schengen calculator

Count your days under the 90/180-day rule, and see how long you can stay.

183-day rule calculator

Count your days in each country per year, and run the US 183-day test.

Golden hour calculator

Find the golden hour and blue hour anywhere, on any day, in local time.

Time zone overlap calculator

Find the hours 2 or more places share, daylight saving included.

Time zone converter

One time in every city you need, with a link that shows each guest their own time.

Second passport calculator

See what a second citizenship would add to your passport.

Marriott Bonvoy status calculator

See your Marriott Bonvoy tier and the nights to the next one.

FIRE calculator

Your FIRE number, the years to it, and how living abroad changes both.

Card fees abroad calculator

See what a payment or withdrawal abroad costs on each card.

UAE company setup cost calculator

See what a UAE free zone company really costs.

FIRE calculator

Your FIRE number, the years to it, and how living abroad changes both.

Hourly to salary calculator

Turn an hourly wage into yearly, monthly and weekly pay, or a salary into hourly.

Online course revenue calculator

What your online course earns a month on each platform, after its fees, and the price that reaches your goal.

What Etsy's fees take from each sale and what you keep, for any country.

What you get from an Upwork contract after your fee, and what your client pays.

What you keep from a Fiverr order after the 20% fee, and what your buyer pays.

Chronological age calculator

Chronological age for a test or an assessment, with the borrowing laid out step by step.

Protein calculator

Your protein a day from the US guidelines, Peter Attia and Gabrielle Lyon, side by side, with grams per meal.

Fitness age calculator

See where your VO2 max heads by 90 at the average decline, and what a hilly hike at 90 needs from you now.

Biological age calculator

Your biological age from nine markers on a standard blood test, next to your real age and your tracker's age.

Pace of aging calculator

How many biological years you age per calendar year, from two or more of your own blood tests.

Zone 2 heart rate calculator

Your zone 2 three ways: Maffetone's formula, your watch's 60 to 70% and Peter Attia's 70 to 85%, with the talk test.

VO2 max calculator

Your VO2 max from your resting heart rate, a 12-minute run or a 1-mile walk, against the average for your age.

TDEE calculator

See how many calories you burn a day, at rest and with your activity, and what to eat for your goal.

BMR calculator

See how many calories your body burns at complete rest, and what your day adds on top.

Aspect ratio calculator

Simplify any size to its ratio, solve the missing side and see the frame drawn to scale.

Percentage calculator

Type 2 numbers and get every percentage answer at once: X% of Y, what percent, the change and the difference.

Discount calculator

See what you pay after a percent off, an extra percent off, a coupon and tax, or find the price before a sale.

Unit price calculator

Compare up to 4 sizes in any units and see which is the best buy, and how much more the others cost.

Age calculator

Your exact age in years, months and days, with your next birthday and your life drawn in weeks.

Chronological age calculator

Chronological age for a test or an assessment, with the borrowing laid out step by step.

Electricity cost calculator

See what a device costs to run a day, a month and a year at your price per kWh.

Ring size calculator

Find your ring size from a paper strip or a ring that fits, in US, UK, European and more sizes.

Ring size converter

Convert a ring size between US, UK, European, Italian and German sizes.

Calorie calculator

Set a daily calorie target for your goal, with the date you'd reach your goal weight and a safe floor.

Macro calculator

Split your calories into protein, fat and carbs, with protein set by your weight and a healthy range for each.

Recipe scaler

Paste a recipe and scale it to any number of servings, with friendly measures and grams for each ingredient.

Cups to grams converter

Turn cups and spoons into grams for 40 ingredients, from USDA's weight per cup.

Cooking converter

Convert any kitchen amount into every unit at once: cups, spoons, milliliters, grams, ounces and pounds.

Oven temperature converter

Convert oven temperatures between °F, °C, fan ovens and gas marks.

Butter conversion calculator

Convert butter between sticks, cups, tablespoons, grams and ounces, by USDA's weights.

Grams to ounces converter

Convert grams to ounces and back, by NIST's exact ounce, with common weights.

Percentage calculator

Type 2 numbers and get every percentage answer at once: X% of Y, what percent, the change and the difference.

Chronological age calculator

Chronological age for a test or an assessment, with the borrowing laid out step by step.

GPA calculator

Work out your GPA weighted by credits, with honors and AP or IB points, and your new GPA overall.

Grade calculator

Your grade so far from each part, and what you need on the final for every letter.

Roman numeral converter

Turn numbers into Roman numerals and back, with each step shown, and dates for a tattoo or an engraving.

Fraction calculator

Add, take away, multiply or divide fractions and mixed numbers, with every step and the answer drawn.

Statistics calculator

Paste your numbers and get every statistic at once: mean, median, mode, standard deviation, quartiles and outliers.

Standard deviation calculator

Find the standard deviation of your numbers, sample or population, with the working value by value.