About Cocolator

Calculators

All Cocolator calculators

Browse practical calculators and generators by category. Each tool is built to be fast, clear, and useful without accounts or saved data.

Choose the right category first

Start with the category that matches your real task rather than the maths alone. Money calculators help with prices, bills, property comparisons, and saving plans. Planning and time calculators help when the answer depends on dates, work hours, deadlines, or how long a target will take. Converter pages are best when you already know the number and only need it in another unit. Health, food, and tech categories are there when the calculation needs more context than a generic calculator can give. All tools are built for quick browser use and the site does not require an account to run them.

General calculators

Simple utility calculators for quick maths and one-off checks when you do not need a more specialised tool.

A standard calculator for plus, minus, times and divide with support for decimals, percentages and parentheses.

Money calculators

Practical money calculators for everyday decisions like bills, savings, discounts, VAT, property comparisons, and rent-vs-buy tradeoffs.

Electricity cost calculator

Enter your usage, price per kWh, and any fixed fee to estimate electricity cost per day, month, and year.

Appliance electricity cost calculator

Work out what an appliance costs to run per use, per day, per month and per year from its watts, hours used and price per kWh.

Fuel Cost Calculator

Estimate petrol or diesel fuel cost for a trip, commute or regular driving. Enter distance, fuel economy and fuel price to calculate total cost, fuel used and cost per mile or kilometre.

Winter Fuel Payment Clawback Calculator 2026

UK-specific estimate of whether HMRC may recover a Winter Fuel Payment because your individual income is above the threshold.

Rent vs Buy Calculator

Compare the estimated cost of renting or buying a home over time, including mortgage payments, down payment, maintenance, equity and alternative investment return.

Percentage calculator

Percent of a number, change between values, and new totals as you type.

Interest calculator

Calculate how money grows over time from a starting balance, monthly saving, and interest.

Savings goal calculator

See how many months it takes to reach a goal with monthly saving and interest.

Currency converter

Convert between common currencies instantly and see both the converted amount and the exchange rate.

Price per square metre calculator

Calculate price per square metre for a property and compare two listings side by side.

Add or remove VAT from an amount and see net, VAT, and gross totals instantly.

Discount calculator

Work out the final price and total saving from a percentage, an optional extra percentage and a fixed discount amount.

Electric vs petrol car cost calculator

Compare electric, petrol, diesel or hybrid running costs using your own electricity price, fuel price, efficiency and driving distance. Estimate cost per mile, cost per kilometre, monthly cost and yearly cost.

Flight fuel cost calculator

Estimate jet fuel use, total flight fuel cost, and fuel cost per passenger across different routes and aircraft types. Built for rough comparison and learning, not airline operational planning.

Electricity

Estimate electricity costs and connect energy use to everyday budgets before the bill arrives.

Electricity cost calculator

Enter your usage, price per kWh, and any fixed fee to estimate electricity cost per day, month, and year.

Appliance electricity cost calculator

Work out what an appliance costs to run per use, per day, per month and per year from its watts, hours used and price per kWh.

Currency converter

Convert between common currencies instantly and see both the converted amount and the exchange rate.

Percentage calculator

Percent of a number, change between values, and new totals as you type.

Planning & time calculators

Plan dates, working time, savings timelines, and everyday time differences without spreadsheet setup.

Time calculator

See date difference, business days, and worked time with breaks and pay.

Savings goal calculator

See how many months it takes to reach a goal with monthly saving and interest.

Conception date calculator

Estimate a conception date from a due date, last period, ultrasound, or birth date, with a likely ±5 day window.

Baby due date calculator

Estimate a due date from your last period, conception date, IVF transfer, or an ultrasound, with current pregnancy week and trimester.

Work out an exact age in years, months and days. Enter a date of birth and choose today, a future date or a past date.

Convert length, weight, area and volume in one shared tool.

Health & body calculators

Quick health and body calculators that turn measurements into clear, easy-to-read results.

See your BMI, the range it falls into, and the weight span considered a healthy range.

Weight Calculator

Estimate a general healthy weight range from your height, based on BMI reference values 18.5 to 24.9.

Army Fitness Test Calculator

Estimate your Army Fitness Test (AFT) score across the five events: deadlift, hand-release push-up, sprint-drag-carry, plank and two-mile run. Not an official U.S. Army tool.

Fun calculators

Playful tools for names, proportions, and creative everyday questions that are still useful to have close at hand.

Baby name generator

Filter local baby name ideas by region, style, gender, origin, and rhythm, then save favorites privately in your browser.

Golden ratio calculator

Work out golden ratio proportions (φ ≈ 1.618) for design, layout, photography, UI and typography.

Converter calculators

Use fast converter tools when you already know the number and need it in another unit, scale, or currency for rough planning.

Currency converter

Convert between common currencies instantly and see both the converted amount and the exchange rate.

Convert length, weight, area and volume in one shared tool.

Temperature converter

Convert between Celsius, Fahrenheit and Kelvin with instant results as you type.

Food & nutrition calculators

Practical calculators for everyday cooking, meal planning, nutrition, and grocery budgets.

Meal cost calculator

Work out the cost per serving from your total ingredient cost and number of servings.

Recipe scaling calculator

Scale a recipe up or down instantly. Enter original servings and new target to see adjusted quantities.

Calories per serving calculator

Estimate calories per serving from the total calories in a recipe and the number of portions.

Protein calculator

Estimate your daily protein needs based on body weight and activity level.

Water intake calculator

Estimate your daily water needs based on body weight and activity level.

Grocery budget calculator

Calculate weekly and monthly grocery costs from household size and spend per person.

Tech calculators

Practical tech calculators for rough AI planning, token estimates, and cost scenarios before you commit to a provider or workflow.

AI cost calculator

Work out the cost per request and daily, monthly and yearly totals for AI models that charge per token. Enter your own prices from your provider's pricing page.

AI Token Calculator

Use this AI token calculator to estimate how many tokens a prompt or text might use. It counts words and characters locally in your browser and gives a simple token estimate for AI planning.