Mini Tools Collection
Useful one-page tools for real work
ToolPatch is a growing collection of focused utilities. Each page handles one task with clear inputs, fast results, and practical outputs.
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Chemistry
Featured
Boyle's Law Calculator
Calculate gas pressure and volume relationships at constant temperature.
Apply Boyle's Law (P₁V₁ = P₂V₂) to solve for unknown pressure or volume. Enter any 3 values to calculate the 4th.
Chemistry
Featured
Charles' Law Calculator
Calculate gas volume and temperature relationships at constant pressure.
Apply Charles' Law (V₁/T₁ = V₂/T₂) to solve for unknown volume or temperature. Automatically converts Celsius to Kelvin.
Chemistry
Featured
Ideal Gas Law Calculator
Solve pressure, volume, moles, or temperature with PV=nRT.
Use the ideal gas law to solve one missing variable given the other three. Great for gas-law homework, exam prep, and quick unit-aware checks.
Chemistry
Featured
Molarity Calculator
Solve molarity, moles, or volume using M = n/V.
Calculate solution concentration and dilution prep values from moles and volume. Useful for lab prep, chemistry coursework, and quick concentration checks.
Chemistry
Featured
pH Calculator
Convert hydrogen ion concentration to pH and classify acidity/basicity.
Compute pH and pOH from [H+] or derive [H+] from pH quickly. Useful for acid-base questions, buffer prep, and classroom exercises.
Chemistry
Dilution Calculator
Use C1V1=C2V2 to solve dilution and solution prep problems.
Determine unknown concentration or volume for dilution planning with one equation. Great for lab workflows, stock solution prep, and chemistry practice.
Chemistry
Reaction Yield Calculator
Calculate percent yield and loss from theoretical and actual yield values.
Enter theoretical and actual yield to evaluate reaction efficiency. Helpful for lab reports, stoichiometry checks, and process optimization basics.