Science
Science tools for physics, chemistry and biology
These calculators cover the equations that come up again and again in science classes, lab reports and quick engineering checks. Each page shows the formula, states the units, and explains the assumptions behind the number instead of returning a bare result.
Everything runs in your browser: values, genotypes and DNA sequences never leave your device. The tools are educational and practical aids — not a substitute for a derivation, a lab protocol or professional safety guidance.
Four science categories · 27 tools
All science tools
Acceleration Calculatoru, v, t → aPhysicsDensity CalculatorMass / volume → DensityPhysicsKinetic Energy CalculatorMass + speed → EnergyPhysicsOhm's Law CalculatorV / I / R → PowerPhysicsProjectile Motion Calculatorv₀, θ → rangePhysicsResistor Color Code CalculatorBands → resistancePhysicsSpeed Distance Time Calculatorv, d, tPhysicsWave Speed Calculatorf, λ → vPhysicsChemical Equation BalancerEQUATION → COEFFICIENTSChemistryDilution CalculatorC1V1 = C2V2ChemistryHalf-Life CalculatorHALF-LIFE → AMOUNTChemistryMolar Mass CalculatorFORMULA → MASSChemistryMolarity CalculatorMOLES → MOLARITYChemistryMole CalculatorMASS ↔ MOLESChemistryChi-Square Genetics CalculatorCOUNTS + RATIO → χ²BiologyCodon TranslatorDNA/RNA → PROTEINBiologyDNA Reverse Complement CalculatorDNA/RNA → COMPLEMENTBiologyGC Content CalculatorDNA/RNA → GC%BiologyMicroscope Magnification CalculatorOBJECTIVE × EYEPIECE → TOTALBiologyPunnett Square CalculatorGENOTYPES → RATIOSBiologyShannon Diversity Index CalculatorCOUNTS → H′BiologyLinear Regression CalculatorX,Y PAIRS → FIT + RScientificMean Median Mode CalculatorNUMBERS → MEAN / MEDIAN / MODEScientificScientific Notation ConverterScientific notationScientificSignificant Figures CalculatorSignificant figuresScientificStandard Deviation CalculatorNUMBERS → MEAN & SDScientificTemperature ConverterTemperatureScientific
Science guides
- Step-by-step how-tos · 6 minOhm's law and circuit basics: voltage, current and power
- Step-by-step how-tos · 6 minProjectile motion and wave basics: from trajectories to v = fλ
- Step-by-step how-tos · 5 minMoles, molar mass and molarity, with worked examples
- Step-by-step how-tos · 5 minBalancing chemical equations: inspection, algebra and checks
Science tools: common questions
Are the science calculators free to use?
Yes. Every science calculator is free, needs no account and has no daily limit. The site is funded by clearly labelled advertising placed around the tools, never inside the result.
Do these tools upload my data or sequences?
No. All science tools are browser calculators: numbers, genotypes and DNA sequences are processed in your tab and never sent to a server. Nothing is stored after you close the page.
Can I use these for coursework and lab reports?
They are useful for checking calculations and seeing the formula behind a result. For graded work, check your course rules on calculator use, keep the assumptions listed on the page with your number, and show your method.
Are these tools suitable for clinical or safety-critical decisions?
No. They are educational and arithmetic aids. Medical, electrical, chemical and laboratory safety decisions require qualified supervision, validated instruments and the procedures that apply to your institution.