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Calculators

Money calculators

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

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Calculators in this category

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.
VAT calculator
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.

When these tools help

This category is for money questions that come up in real life, not finance theory. Start with percentage, VAT, or discount when you need to check a price. Use electricity, appliance electricity, fuel cost, or petrol vs electric when you want to connect energy use and travel to a real monthly bill. Open savings goal or interest when the question is about time, growth, or whether a plan is realistic. For larger decisions, rent vs buy and price per square metre help break a complicated comparison into assumptions you can see and change. The aim is to make the numbers clearer before you commit to a purchase, budget, contract, or long-term plan.

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