How To Calculate Percentage Recovery In Lab Chemistry
Learn how to calculate percentage recovery from actual recovered amount and starting or theoretical amount, with chemistry lab examples and limits.
Read the GuideScience Calculators
Free calculators for common lab and classroom science calculations, from percentage concentration to solution dilution, with more tools added as the collection grows. Each one states its formula and convention clearly, since these terms can mean different things depending on context.
All Science Calculators
Shelf Life Calculator
Estimate product shelf life at elevated test temperatures using the ASLT formula. Enter your reference days, temperatures, and z-value to get results.
Open the CalculatorBoyle's Law Calculator
Solve for the unknown pressure or volume of an ideal gas at constant temperature. Enter three known variables into Boyle's Law to find the fourth.
Open the CalculatorSuperheat Calculator
Calculate your HVAC system superheat quickly. Enter the measured suction line temperature and the saturation temperature from a PT chart to find the value.
Open the CalculatorAnimal Gestation Calculator
Estimate a due date for sheep, dog, or pig pregnancy from the breeding date and the species average gestation length.
Open the CalculatorIdeal Gas Calculator
Solve the ideal gas law for pressure, volume, moles, or temperature while the tool converts common chemistry and physics units.
Open the CalculatorWater Potential Calculator
Find plant water potential from molarity, heat, particle factor, and pressure for biology, osmosis, and turgor problems.
Open the CalculatorPPM Calculator
Find parts-per-million concentration from solute mass and either solution mass or volume, with separate modes for mg/kg and mg/L.
Open the CalculatorVPD Calculator
Calculate air or leaf vapor pressure deficit from temperature and relative humidity for greenhouse and horticulture checks.
Open the CalculatorCorn Yield Calculator
Estimate field corn yield in bushels per acre from a 1/1000-acre ear count, kernel rows, kernels per row, and kernel weight.
Open the CalculatorPunnett Square Calculator
Build one-gene or two-gene Punnett squares from parent allele pairs and see the grid, genotype ratio, and phenotype ratio.
Open the CalculatorPercentage by Weight Calculator
Find weight by weight percent from a part mass and total mass for chemistry class, lab notes, or weighed solution records.
Open the CalculatorPercentage of Volume Calculator
Find v/v% from a part volume and final volume for liquid mixes, gas mixes, lab notes, and class problems.
Open the CalculatorDilution Calculator
Plan a lab mix, or an alcohol dilution, with C1V1 = C2V2 from stock strength, stock volume, target strength, and final volume.
Open the CalculatorWhat You Can Work Out With These Science Calculators
Science calculators handle the concentration, composition, and measurement maths that comes up in the lab and the classroom. Much of this work is about ratios and proportions: expressing one quantity as a share of a total by mass or by volume, or scaling a solution from one strength to another. The arithmetic is usually straightforward, but the meaning depends on getting the base right and keeping units consistent, which is where careful setup matters more than the calculation itself.
Every tool in this section states its formula, works an example step by step, and is explicit about what the result does and does not represent, since a result by mass and a result by volume can differ for the same mixture. Where it matters, the pages include safe-handling notes, such as the order in which to combine a concentrate and a solvent. These are educational tools; always follow your own lab safety rules and supervisor guidance for real procedures. For the formulas on their own, see the formula reference.
Related Resources
- Guides & Blogs . Guides and blog posts on how to use our calculators and understand the concepts behind them.
- Formulas . The exact formulas behind each calculator, with the notation and reasoning explained.
- Glossary . Short definitions of the terms you will meet across our calculators, including BMI, BMR, amortization, and more.
- Methodology . How we choose formulas, test calculations, round results, select sources, and review our tools.
Recent Guides
View All →How To Calculate Animal Gestation Dates By Species
Learn how to calculate animal gestation from a breeding date, average species gestation, and due-date ranges for sheep, dogs, pigs, and other animals.
Read the GuideHow To Calculate Boyle's Law With Pressure And Volume
Learn how to calculate Boyle's law with P1V1 = P2V2, rearrange pressure and volume, keep units consistent, and check constant-temperature assumptions.
Read the GuideFrequently asked questions
What science calculations can I do here?
Percent by weight (mass concentration), percent by volume, and solution dilution, using standard chemistry conventions. Each page states exactly which convention it uses, since these terms vary by context.
Are these calculators reliable for lab work?
They are educational tools verified against university chemistry references. For graded coursework or lab reports, always confirm the convention your course or lab manual expects, since percent by weight and percent by volume can be defined differently in different contexts.
Are the science calculators free to use?
Yes, every tool here is free, with no sign-up and no limit.