START WITH THE INFORMATION YOU HAVE
Concentration and conversion tools
Convert a known amount, make a label easier to read, or rewrite a confirmed concentration. Choose the tool that matches the values in front of you.
- MASS ↔ VOLUME
mg to mL converter
Convert mass and volume using an explicit ingredient concentration or whole-substance density. Follow the steps, check a reference table or convert several values together.
Convert mg and mL - LABEL RATIO → mg/mL
Concentration label converter
Rewrite paired label values such as mg per 5 mL as mg per mL. Enter the original mass and volume, with help distinguishing concentration from package size.
Read a concentration label - CONFIRMED % w/v ↔ mg/mL
Percent to mg/mL calculator
Convert a confirmed mass-per-volume percentage to mg/mL, or reverse it. The tool requires the w/v basis and explains why w/w and v/v are different.
Convert a w/v percentage - mg/mL ↔ MOLAR CONCENTRATION
mg/mL to molarity calculator
Convert a known concentration to M, mM or µM using the matching molar mass, or reverse the conversion. See the units cancel at each step.
Convert concentration to molarity - INGREDIENT MASS VS WHOLE SAMPLE
Concentration vs density
Compare ingredient and total liquid mass for the same sample. Enter concentration, whole-mixture density and volume to see which quantity answers your question.
Compare the two mass meanings - TWO LABELS → ONE COMPARISON
Compare concentrations
Compare two explicit mass-per-volume label ratios in mg/mL, with their concentration ratio and difference relative to Label B.
Compare two concentration labels - REPORT BASIS + DENSITY → mg/mL
ppm to mg/mL converter
Distinguish mass-fraction ppm from an explicit mg/L convention, then convert using whole-mixture density when needed.
Check a ppm report and convert - LABELS + FILLED VOLUMES → TOTAL mg
Ingredient mass inventory
Total the same named ingredient across containers with different concentration labels, known filled volumes and matching container counts.
Total an ingredient inventory - LABORATORY CONCENTRATION ARITHMETIC
mg/mL dilution calculator
Calculate a lab stock portion from explicit stock and target mg/mL concentrations and a final solution volume. Shows conserved ingredient mass and limits.
Calculate stock portion - MASS FRACTION TO VOLUME CONCENTRATION
Percent w/w to mg/mL calculator
Convert a confirmed percent by mass (w/w) to mg/mL with the measured density of the whole solution. Keep mass-percent and mass-per-volume percent separate.
Convert with density - CONSERVED INGREDIENT MASS
Mixed solution concentration calculator
Calculate combined mg/mL from two known concentrations and sample volumes, using an explicit measured final volume. For the same ingredient with no reaction or loss.
Calculate a combined concentration - LABORATORY CALIBRATION ARITHMETIC
Standard curve concentration calculator
Calculate sample mg/mL from a measured signal and known linear calibration slope and intercept, then apply an explicit dilution factor. No dose guidance.
Calculate sample concentration - SPECTROPHOTOMETRIC CONCENTRATION
Beer–Lambert mg/mL calculator
Calculate mol/L and mg/mL from blank-corrected absorbance using explicit analyte molar absorptivity, optical path length and molar mass. Laboratory arithmetic only.
Convert absorbance to mass concentration - LABORATORY CONCENTRATION TRACKING
Two-step serial dilution calculator
Track mg/mL through two sequential aliquot-to-final-volume dilutions, with concentrations at each stage and the overall dilution factor. No dose guidance.
Track both dilution stages - LAB SOLUTION MASS BALANCE
Powder purity solution calculator
Calculate powder mass needed for a target analyte mg/mL and final solution volume when the powder’s assay purity is explicitly known. No dosing advice.
Calculate powder to weigh - LABORATORY CONCENTRATION RECOVERY CHECK
Spike recovery calculator
Calculate analyte spike recovery from sample and stock mg/mL, their volumes, and measured spiked concentration, correcting the native sample for added volume.
Check recovered spike mass
These tools perform the arithmetic using values you provide. They do not choose a dose or infer missing label information. For help or a correction, contact contact@mgtoml.app.