Free Tools for Teachers & Students
School days are full of small calculations and quick decisions that eat into time meant for learning. These free tools handle the arithmetic and admin so students can focus on the work and teachers can keep a lesson moving. Students use the GPA and final grade calculators to see exactly what score they need on an exam, check fraction homework step by step, and work through physics or trigonometry problems on a full scientific calculator.
In class, teachers project the random picker to choose who answers next or to split groups fairly, run a visible stopwatch for timed activities, and set a Pomodoro timer for focused study blocks. The typing speed test makes a quick warm-up or keyboarding benchmark. Morse code, Braille, Roman numerals and the NATO phonetic alphabet turn into ready-made lessons on communication and history. Everything runs in the browser with no accounts for students, no installs on school devices and nothing to configure before the bell rings.
Our calculators can be embedded on other websites for free — open any calculator and use the Embed button.
Grades & math
- GPA CalculatorStudents can check where a semester leaves their GPA before report cards arrive, using their own credit hours.
- Final Grade CalculatorShows the exam score a student needs to reach a target grade, which helps decide where to focus revision.
- Fraction CalculatorUseful for checking fraction homework answers, with results shown in simplest form.
- Scientific CalculatorCovers trig, logs and powers for algebra, physics and chemistry work on a device without a handheld calculator.
- Percentage CalculatorHandy for teachers turning raw marks into percentages and for students checking percent-change problems.
Study & focus
- Pomodoro TimerBreaks homework or revision into timed focus blocks with short breaks between them.
- Stopwatch & TimerGives a large, visible timer for timed quizzes, reading sprints or group activities.
- Typing Speed TestA quick keyboarding warm-up that reports words per minute and accuracy, so progress is easy to track.
- Word & Character CounterLets students check essay length against an assignment limit before they submit.
Classroom activities
Codes & alphabets
- Morse Code TranslatorTurns a lesson on telegraphs and early communication into a hands-on activity.
- Braille TranslatorShows how written words map to Braille cells, a starting point for lessons on accessibility.
- Roman Numeral TranslatorHelps with history dates, clock faces and the Roman numerals that still appear in math worksheets.
- NATO Phonetic AlphabetTeaches the spelling alphabet used by pilots and emergency services, useful for clear spelling over the phone.
Frequently asked questions
- Do students need an account?
- No. Every tool works without signing in, so you can share a link and students can start straight away on any school laptop, tablet or phone.
- Can I show these on a classroom projector?
- Yes. The pages are readable at large sizes, and the random picker, stopwatch and Pomodoro timer are designed to be seen from across a room.
- Can I put a grade calculator on my class website?
- Yes. The GPA, final grade and percentage calculators can be embedded on another website for free using the Embed button on each calculator page.