Free Student, Science & Grade Calculators
Calculators for students and teachers: work out your GPA and course grades, then move on to physics, chemistry, electrical engineering and biology problems — every one shows the formula and the working.
Grading systems differ between schools and countries, so each grade tool states the scale it uses. Science calculators use SI units unless a unit is shown next to the field.
52 free tools · No sign-up · Works on phones and computers
Start here
Popular education tools
- GPA CalculatorSemester and cumulative GPA from your grades and credit hours.
- Speed, Distance & Time CalculatorFind speed, distance or travel time from the other two, in km, miles or metres.
- Interactive Periodic TableAll 118 elements with atomic numbers, masses, groups and categories. Search and filter.
- Ohm's Law CalculatorVoltage, current, resistance and power from any two of them.
- APA Citation GeneratorAPA 7th edition references and in-text citations for books, articles and websites.
All education tools
Grouped by what they help you do.
52 tools
- GPA CalculatorPopularSemester and cumulative GPA from your grades and credit hours.
- Weighted Grade CalculatorYour overall course grade from weighted assignments and exams.
- Final Exam Grade CalculatorThe score you need on your final exam to reach the grade you want.
- Marks Percentage CalculatorTurn exam marks into a percentage, for one subject or many.
- CGPA to Percentage ConverterConvert CGPA to percentage using common university formulas.
- Test Grade CalculatorA test score from questions wrong or points earned, with a printable grading chart.
- GPA Goal PlannerThe GPA you need in your remaining credits to reach a target cumulative GPA.
- Speed, Distance & Time CalculatorPopularFind speed, distance or travel time from the other two, in km, miles or metres.
- Acceleration CalculatorAcceleration, final or initial velocity, or time — plus distance covered.
- Force Calculator (F = ma)Newton's second law and weight: solve for force, mass or acceleration.
- Momentum CalculatorMomentum p = mv and impulse J = FΔt, solved for any variable.
- Energy CalculatorKinetic, potential and mass–energy (E = mc²), solved for any variable.
- Power CalculatorPower from work and time, voltage and current, or force and velocity.
- Pressure CalculatorPressure from force and area, or fluid pressure at depth (ρgh).
- Density CalculatorDensity, mass or volume from the other two — and whether it floats in water.
- Work CalculatorWork done from force and distance, or from power and time, in joules.
- Projectile Motion CalculatorRange, flight time and maximum height for any launch speed, angle and height.
- Gravitational Force CalculatorNewton's law of universal gravitation between any two masses.
- Wavelength CalculatorWavelength from speed and frequency, for sound, light and photons.
- Frequency CalculatorFrequency from the period or from wave speed and wavelength, plus angular frequency.
- Interactive Periodic TablePopularAll 118 elements with atomic numbers, masses, groups and categories. Search and filter.
- Molar Mass CalculatorMolar mass of any formula with a breakdown by element and mass percent.
- Chemical Equation BalancerBalance any chemical equation with the smallest whole-number coefficients.
- Stoichiometry CalculatorMasses and moles of every reactant and product from one known amount.
- Mole CalculatorConvert grams to moles, moles to grams, and moles to particles.
- Molarity CalculatorMolarity, mass of solute to weigh out, or volume of solution needed.
- Dilution & Concentration CalculatorC₁V₁ = C₂V₂ dilutions, mass percent and parts per million.
- pH CalculatorConvert between pH, pOH, [H⁺] and [OH⁻] — and see if it's acidic or basic.
- Ideal Gas Law CalculatorSolve PV = nRT for pressure, volume, moles or temperature.
- Half-Life CalculatorRadioactive decay: amount remaining, time elapsed, initial amount or half-life.
- Ohm's Law CalculatorPopularVoltage, current, resistance and power from any two of them.
- Resistance CalculatorResistors in series and parallel, and the resistance of a length of wire.
- Resistor Color Code CalculatorRead 4- and 5-band resistor colour codes, with the tolerance range.
- Voltage Divider CalculatorOutput voltage of a resistor divider, or the resistor you need for a target voltage.
- Capacitor CalculatorCapacitors in series and parallel, stored charge and energy, and RC time constants.
- Inductor CalculatorInductors in series and parallel, stored energy and inductive reactance.
- Power Factor CalculatorPower factor, reactive power and the correction needed, single- or three-phase.
- Coulomb's Law CalculatorElectrostatic force between two charges, attractive or repulsive.
- Beam Load CalculatorReactions, bending moment, shear and deflection of a simply supported beam.
- Stress CalculatorNormal stress from force and area, and Young's modulus from stress and strain.
- Strain CalculatorStrain from change in length, or from stress and Young's modulus.
- Reynolds Number CalculatorReynolds number for pipe flow and whether it's laminar or turbulent.
- Punnett Square CalculatorMonohybrid, dihybrid and trihybrid crosses with genotype and phenotype ratios.
- DNA Complement & Transcription ToolComplement, reverse complement, mRNA, protein translation and GC content.
- APA Citation GeneratorPopularAPA 7th edition references and in-text citations for books, articles and websites.
- MLA Citation GeneratorMLA 9th edition Works Cited entries and in-text citations.
- Chicago Citation GeneratorChicago Manual of Style bibliography entries and author-date citations.
- Harvard Referencing GeneratorHarvard (Cite Them Right) references and in-text citations.
- IEEE Citation GeneratorIEEE numbered references for engineering and computer science papers.
- Reference List GeneratorBuild a full bibliography in APA, MLA, Chicago, Harvard or IEEE — sorted and ready to paste.
- BibTeX GeneratorCreate BibTeX entries for LaTeX, Overleaf, Zotero and Mendeley.
- Literature Review MatrixOrganise sources by aim, method, findings and limitations in an editable table.
Education tools: common questions
Which GPA scale is used?
The GPA calculator uses the common US 4.0 scale by default and lets you switch to a 4.3 scale or enter grade points directly.
Will my school calculate it the same way?
Usually, but not always. Some schools weight honors classes or round differently. Always check your official transcript.
Explore other categories
- 41 tools
Calculators
Percentages, algebra, statistics, geometry and everyday math.
- 22 tools
Finance
Loans, mortgages, interest, savings and salary in plain numbers.
- 30 tools
Converters
Length, weight, temperature, area, volume, speed and more.
- 42 tools
Text
Count words, change case, clean up and compare text.
- 61 tools
Developer
Format, validate, convert and encode code and data.
- 33 tools
Images
Compress, resize, crop and convert photos in your browser.
- 35 tools
PDF
Merge, split, rotate and convert PDF files.
- 15 tools
Audio
Trim, join, speed up and clean up audio, and record your voice.
- 11 tools
Files
Zip, unzip, compress, rename and inspect files.
- 9 tools
SEO
Meta tags, schema, robots.txt, sitemaps and SERP previews.
- 16 tools
Web
QR codes, URL tools, UTM links and browser info.
- 31 tools
Design
Colors, palettes, gradients, contrast and CSS helpers.
- 29 tools
Business
Invoices, receipts, margins, markup, VAT and ROI.
- 29 tools
Date & Time
Age, date differences, time zones, timers and clocks.
- 9 tools
Security
Strong passwords, passphrases, hashes and secure tokens.
- 8 tools
Health
BMI, calories, body fat, water intake and sleep.
- 15 tools
Everyday
Random pickers, dice, a notepad, typing test and more.
- 5 tools
Smart Text
Summarize, extract keywords, analyze tone and count tokens.