AquaVerify
AquaTools Free laboratory calculators
Free browser-based calculators for laboratory dilutions, molarity, unit conversion, centrifuge RCF, CFU, recovery, hardness, alkalinity and nutrient species.
AquaTools Free
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Free browser-based calculators for laboratory dilutions, molarity, unit conversion, centrifuge RCF, CFU, recovery, hardness, alkalinity and nutrient species.
- Dilution calculator Solve C1V1, prepare from stock or calculate serial dilution steps.
C1 x V1 = C2 x V2 - Molarity calculator Convert mass, moles or mass concentration into mol/L, mM, µM and nM.
M = m / (MW x V) - Laboratory unit converter Convert mass, volume, moles, molarity, mass concentration and temperature units.
value_to = value_from x factor - RPM to RCF converter Convert centrifuge RPM to RCF, or RCF back to RPM, using the real rotor radius.
RCF = 1.118 x 10^-5 x r_cm x RPM^2 - CFU calculator Calculate CFU/mL from colonies, dilution fraction and plated volume.
CFU/mL = colonies / (dilution fraction x plated volume mL) - Recovery, bias and RPD calculator Calculate spike recovery, bias and relative percent difference without default acceptance criteria.
RPD% = |A - B| / ((A + B) / 2) x 100 - Hardness and alkalinity calculator Calculate hardness from Ca and Mg, CaCO3 equivalents or alkalinity from titration.
Hardness as CaCO3 = Ca x 2.497 + Mg x 4.118 - Chemical species converter Convert nutrient reporting forms such as nitrate to nitrate-nitrogen.
target = source x MWtarget / MWsource
Private by design
Inputs and results stay in your browser. AquaTools Free does not send calculation values to AquaVerify servers.
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This calculator is an educational and workflow aid. It does not replace a validated method, SOP, accreditation decision or regulatory interpretation.