Best Online Calculators in 2025

Helping you make rational decisions, one calculation at a time.

Key Omni Calculator features:

User-Friendly Interface Wide Range of Calculators Accuracy Educational Value

FlexiQuiz is a powerful online test generator that enables you to create engaging online quizzes, tests, or exams in minutes. Choose from 100's of features to create a customized quiz that meets your objectives for business, education, or fun. .

Key FlexiQuiz features:

Question bank Groups Courses Add media

Try for free freemium $25.0 / Monthly (Essentials plan)

Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.

Key calculator.net features:

Comprehensive Range of Calculators User-Friendly Interface Free Access Detailed Explanations

The 100% free and reliable online calculators that help you to solve any calculation-related problems and provides you with the precise measurements.

Key Calculator-online.net features:

Variety of Calculators User-Friendly Interface Free Access Educational Content

free

Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.

Key Sleep Cycle features:

Accurate Sleep Tracking Smart Alarm Clock Customizable Sleep Goals Sleep Aid Programs

Calculatored presents the variety of calculation tools. Whether you are a Student, Teacher or a Businessmen you can find the best tool for your requirement.

Key Calculatored features:

Wide Range of Tools User-Friendly Interface Free Access Educational Value

Use the TDEE calculator to learn your Total Daily Energy Expenditure, a measure of how many calories you burn per day. This calculator displays MUCH more!

Key TDEE Calculator net features:

User-Friendly Interface Comprehensive Input Options Detailed Results Additional Resources

Want to wake up in a good shape?

Key Sleep Calculator features:

User-Friendly Interface Scientific Basis Customizable Options Free to Use

How early can you 🍹retire if you move to another place?

Key Financial Independence Calculator features:

Comprehensive Insights Easy to Use Customizable Inputs Visual Representation

TALLY COUNTERS is a digital counting app through which users can count their reps, amount of traffic, and can even count the number of people.

Key TALLY COUNTERS features:

Simplicity Portability Manual Operation Accuracy

Free UK VAT calculator. We have created this VAT calculator as a free to use tool for calculating VAT rates in the UK.

Key VATCalculators.co.uk features:

User-Friendly Interface Comprehensive VAT Calculations Free to Use Quick Results

Common alarm clocks ignore your sleep cycles, they wake you on schedule no matter your are currently in your deep sleep. Waking up from deep sleep is unpleasant, it makes you tired and it may negatively affect your productivity during the whole day.

Key Sleep as Android features:

Sleep Tracking Integration with Smart Devices Alarm with Smart Wake-up Sleep Sounds and Snore Detection

Sleep Time provides insight into your sleep patterns. By tracking your level of movement throughout the night, Sleep Time generates customized sleep data in easy-to-read charts.

Key Sleep Time - Alarm Clock features:

Smart Alarm Sleep Analysis User-Friendly Interface Customization Options

It's More easy to covert the UNITS now with the APP.

Key Unit Converter features:

User-Friendly Interface Wide Range of Units Offline Functionality Regular Updates