EVERYDAY TOOLS, MADE CLEAR

Free Online Calculators & Everyday Tools

Simple, accurate tools to help you make smarter financial decisions, solve everyday problems and save time.

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Popular Tools

Quick access to some of ToolNest’s most useful everyday calculators.

Mortgage Calculator

Estimate monthly mortgage repayments and total interest.

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Credit Card Repayment Calculator

Estimate how long it could take to repay a credit card balance.

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Salary Calculator

Estimate take-home pay from your salary.

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Loan Calculator

Calculate loan repayments, interest and total repayment.

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Savings Calculator

See how regular saving could grow over time.

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Compound Interest Calculator

Calculate compound growth and investment returns.

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VAT Calculator

Add or remove VAT from a price.

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Stamp Duty Calculator

Estimate Stamp Duty Land Tax on a property purchase.

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Budget Planner

Compare your income and spending to understand your monthly budget.

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Why use ToolNest?

ToolNest provides free, practical online calculators and utilities designed to make everyday calculations and small tasks easier to understand.

Clear calculations

ToolNest calculators show useful results, breakdowns and explanations rather than only displaying a single number.

Free to use

ToolNest tools can be used directly in your browser without creating an account or paying a subscription.

Built for everyday tasks

From money and household costs to maths, dates and text utilities, ToolNest brings useful tools together in one place.

Many ToolNest calculators also include worked examples, formulas, explanations and frequently asked questions so you can understand how the result was produced and when the calculation may be useful.

Browse tools by category

Find the right calculator or utility by choosing a category below.

Finance & Money

Mortgage, loans, savings, salary, tax and personal finance tools.

Business

Profit, margin, commission, ROI and business calculation tools.

Vehicle & Household

Fuel, electricity, water, speed and unit conversion tools.

Maths

Percentages, averages, ratios, fractions and scientific calculations.

Date & Time

Age, date and time calculation tools.

Text & Developer

Text formatting, counters, generators and developer utilities.

Security & Health

Password tools and everyday health calculators.

Latest Guides

Practical explanations and worked examples for the numbers behind everyday decisions.

Finance & Money

Mortgage Overpayments: How Much Can You Save?

See how regular mortgage overpayments can reduce interest and shorten your mortgage term.

Read guide →

Vehicle & Household

Fuel Cost Per Mile: How Much Does Driving Cost?

See how MPG, mileage and fuel price affect journey and annual fuel costs.

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Vehicle & Household

Fuel Cost Per Mile: How Much Does Driving Cost?

See how MPG, mileage and fuel price affect journey and annual fuel costs.

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Maths

Percentage Increase, Decrease & Reverse Percentages

Learn the formulas behind percentages, discounts, percentage change and reverse percentage calculations.

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Maths

Percentage Increase, Decrease & Reverse Percentages

Learn the formulas behind percentages, discounts, percentage change and reverse percentage calculations.

Read guide →

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Simple tools without the clutter

ToolNest is a growing collection of straightforward online calculators, converters and utilities. The aim is simple: provide useful tools that are quick to access, easy to understand and supported by enough information to help users interpret the result.

Whether you are comparing loan repayments, checking household costs, working with percentages, calculating dates or cleaning up text, ToolNest is designed to help you get the answer without unnecessary complexity.

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