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Free online tools

Free online tools and calculators that run in your browser. No sign up, no download and nothing to install. Pick a tool, type your numbers and get the answer straight away.

18 free toolsNo sign upRuns in your browserNothing stored

Grade calculators

Grade calculatorTurn your scores into a percentage and a letter grade Final grade calculatorThe score you need on your final exam Weighted grade calculatorClass grade from weighted assignments Semester grade calculatorQuarters plus the final exam

Date and age calculators

Age calculatorExact age in years, months and days Baby age calculatorYour baby's age in weeks and months Dog age calculatorDog years converted to human years Days between datesCount the days between any two dates

Website and WordPress tools

Aspect ratio calculatorFind a ratio or the missing width or height SVG to PNG converterAny size, transparent background PNG to WebP converterSmaller images for faster pages Meta tag generatorTitle and description with a Google preview Schema markup generatorFAQ, review, article and local business JSON-LD WordPress robots.txt generatorSafe rules with your sitemap added

Everyday calculators

Discount calculatorSale price and amount saved Body fat percentage calculatorEstimate your body fat percentage

Design and business tools

Hex color pickerHex, RGB and HSL color codes Free barcode generatorCode 128, EAN-13, UPC-A and Code 39

About these free online tools

This page lists every free tool on Swift Web Dev. There are eighteen so far: free online calculators for grades, dates and ages, a few everyday calculators, a color picker, a barcode generator and a set of website and WordPress tools. Each one does a single job and shows the answer as you type.

They are browser tools. The math runs on your own phone or computer, inside the page. That has three practical results:

No sign up. There is no account, no email form and no trial. Open a tool and use it.
Nothing is sent to a server. Your grades, dates, measurements and colors stay on your device. We do not store them.
They are quick. There is no waiting for a reply from a server, so results change the moment you change a number.

Every tool page also explains the method. You get the formula, a worked example you can follow by hand and answers to the questions people ask most. If you want to check the result yourself, you can.

The tools work on phones, tablets and computers in any current browser. Each page is kept light so it opens quickly.

We are a WordPress development studio, and we build calculators like these for client websites. These pages are free to use for school, work or anything else. If one gives you an answer that looks wrong, tell us and we will check it.

Free online tools questions

Are these online tools really free?

Yes. Every tool on this page is free to use as often as you like. There is no trial and no paid version.

Do I need to sign up or install anything?

No. There is no sign up and nothing to download. Each tool opens in your browser and is ready to use.

Is the information I type saved or sent anywhere?

No. The calculations run in your browser on your own device. What you type is not sent to a server and is not stored by us.

Do the tools work on a phone?

Yes. Every tool works on phones, tablets and computers in any current browser.

Need a calculator like this on your website?

Swift Web Dev builds custom calculators and tools for WordPress sites: quote forms, pricing estimators, booking logic and more.

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