Solutions & Concentrations

  • Original Concentration from Dilution Calculator
    Reverse the dilution equation to find the original concentration C1 from the final concentration C2, final volume V2, and initial volume V1.
  • Drug Infusion Rate from Dose Calculator
    Calculate IV infusion pump rate in mL/hr from a weight-based dose (mcg/kg/min) and solution concentration. Fast, accurate drip rate tool for clinicians.
  • Dilution Factor Calculator
    Calculate the dilution factor (fold) needed to reach a target concentration from a stock solution, plus stock and diluent volumes for a given final volume.
  • Final Volume to Dilute to Target Concentration Calculator
    Calculate the final volume (V2) to dilute a stock solution to a target concentration using C1V1 = C2V2. Free dilution calculator with solvent-to-add output.
  • Specific Gravity to Density Calculator
    Convert specific gravity (SG) to density. Multiply SG by the reference water density (1000 kg/m³) to get density in kg/m³, g/cm³ and g/L instantly.
  • % w/w to Molarity Calculator
    Convert percent by weight (% w/w) to molarity using solution density and molecular weight. Free chemistry calculator: M = (10 × %w/w × ρ) / MW.
  • Molar Concentration Unit Converter
    Convert molar concentrations between M, mM, µM, nM and pM instantly. Includes micromolar to nanomolar and every other prefix conversion.
  • Moles to Molarity Calculator
    Convert moles of solute and solution volume into molarity (mol/L). Free chemistry concentration calculator with formula, example, and FAQ.
  • Antifreeze Mixture Calculator
    Calculate the final antifreeze (coolant) concentration percent by volume from your antifreeze and water amounts. Free, instant mixture ratio tool.
  • Potential Alcohol Calculator
    Estimate potential alcohol (% ABV) from your wine or must reading. Enter specific gravity or Brix to predict the final ABV if fermented to dry.
  • Buffer Dilution Calculator
    Dilute a concentrated buffer (10X, 5X, 50X) to 1X. Enter final volume and fold to get stock and diluent volumes instantly.
  • Dilution Factor from Volumes Calculator
    Calculate the dilution factor from sample and diluent volumes. DF = (V_sample + V_diluent) / V_sample. Free, instant lab dilution tool.
  • Mass of Solute from Molarity and Volume Calculator
    Calculate the mass of solute needed for a solution from its molarity, volume, and molar mass using m = M x V x MW. Fast and accurate for chemistry.
  • mmol/L to mg/dL Calculator
    Convert mmol/L to mg/dL for glucose, cholesterol, creatinine, urea and more. Uses mg/dL = (mmol/L × MW) / 10 with selectable molecular weights.
  • mg/dL to mmol/L Calculator
    Convert mg/dL to mmol/L for glucose, cholesterol, triglycerides or any substance using its molecular weight. Fast, accurate clinical unit converter.
  • IV Drip Rate Calculator (gtt/min)
    Calculate IV drip rate in drops per minute (gtt/min) from volume, infusion time, and drop factor. Free, fast nursing flow-rate tool.
  • EC to TDS (ppm) Calculator
    Convert electrical conductivity (EC in µS/cm or mS/cm) to TDS in ppm using a 0.5, 0.64, or 0.7 conversion factor. Free, instant water quality tool.
  • OD600 to Cell Density Calculator
    Convert OD600 optical density to cell density (cells/mL) using a conversion factor. Estimate bacterial cell counts for E. coli and other cultures.
  • IV Infusion Rate Calculator
    Calculate IV infusion rate in mL/hr from total volume and time. Also computes drip rate (gtt/min) using a drop factor. Fast, free pump-rate tool.
  • Dose to Volume Calculator
    Convert an ordered medication dose into the volume to administer using stock concentration. Volume = Dose / Concentration. Fast, free dosage tool.
  • Fold Dilution Calculator
    Calculate the fold dilution (X-fold) from sample and final volumes. Get the dilution factor and the diluent volume to add for any lab dilution.
  • mg/kg Dosage Calculator
    Calculate a weight-based medication dose in mg using the mg/kg formula. Enter dose per kg and body weight (kg or lb) for instant results.
  • Pool Chlorine Dosage Calculator
    Calculate how much chlorine to add to your pool to reach a target free chlorine ppm. Enter volume, current and target ppm, and product strength.
  • Mass Needed for Molarity Calculator
    Calculate the mass of solute in grams needed to prepare a solution of a given molarity and volume. Enter molarity, volume, and molar mass.

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