Tools · For work and study
A workbench for the numbers.
Small calculators for the sums you do again and again in class or at the bench. Each one shows the formula it used, so you can check the working and not just the answer.
01 · THE WORKBENCH
Three tools, ready to use.
Dilution calculator
How much stock solution to take to make a weaker one.
Take this much stock, V₁
Then add solvent up to the final volume
V₁ = (0.1 × 250) ÷ 1 = 25.00 mL
Strong assumption: complete mixing; density ≈ water. Read guide →
02 · ALL TOOLS
The full toolbox.
Showing 12 of 12 tools
- Chemistry AVAILABLE
Molar mass calculator
Type a formula, get its mass per mole and a breakdown by element.
Open tool → - Chemistry PLANNED
Interactive periodic table
Look up any element and compare trends.
Coming to the workbench
- Chemistry PLANNED
Equation balancer
Balance a chemical equation and see the steps.
Coming to the workbench
- Chemistry PLANNED
Ideal gas law
Solve PV = nRT for any one unknown.
Coming to the workbench
- Biology PLANNED
Punnett square
Predict offspring ratios from two parents.
Coming to the workbench
- Biology PLANNED
Hardy–Weinberg calculator
Allele and genotype frequencies in a population.
Coming to the workbench
- General PLANNED
Lab unit converter
Mass, volume, concentration and temperature.
Coming to the workbench
- General PLANNED
Significant figures
Count and round to the right number of figures.
Coming to the workbench
- General PLANNED
Half-life calculator
How much of a substance remains after a given time.
Coming to the workbench
03 · HOW EVERY TOOL BEHAVES
Built to be checked.
Shows the formula
You see the equation and your numbers in it, not only a result.
States its limits
Each tool says what it assumes and warns when an input falls outside that.
Links to the guide
One click takes you to the explanation behind the calculation.
Questions about the tools
- No. Every calculator is free and works instantly in your browser without any sign-up. This follows the open-access ethos of resources like Wolfram Alpha but focuses on educational transparency — you always see the formula, not just the answer.
- Type a chemical formula (e.g. H₂O, Ca(OH)₂) and the tool parses it element by element using IUPAC 2021 standard atomic weights. It handles nested brackets and shows a per-element breakdown so you can check the working.
- It uses the dilution equation C₁V₁ = C₂V₂, valid for simple serial dilutions of any unit-consistent pair. This is the standard approach described in NCBI lab protocols and most undergraduate chemistry lab manuals.
- For strong monoprotic acids and bases the formula pH = −log₁₀[H⁺] is exact. Weak acids, polyprotic acids and buffers require the Henderson–Hasselbalch equation or full iterative treatment — see Khan Academy AP Chemistry for those cases. The tool warns you when inputs fall outside its scope.
- The current tool uses the NCBI standard genetic code (transl_table=1), which covers the vast majority of nuclear genes. Mitochondrial and other alternative codes are planned for V2.
Need a tool that is not here?
Tell us which calculation you repeat most and we will consider it for the workbench.