All Dilution Calculators & Subtools
Pick from 158 free tools. Each one does one job well. Search by name, or jump to a topic below.
Core C₁V₁ & Volume Solvers
C₁V₁ = C₂V₂ Calculator
Solve for any one of the four values. Type the other three.
Stock Volume Calculator
Find how much stock to use. Then top up to the final mark.
Final Concentration Calculator
Find the strength after you dilute. Enter stock and volumes.
Initial Concentration Calculator
Find the stock strength you need. Work back from the target.
Final Volume Calculator
Find the total volume that hits your target. Use what stock you have.
Diluent Volume Calculator
Find how much water or buffer to add. Volumes are taken to add up.
Make-to-Volume Calculator
Find the stock to add, then fill to a set final volume. Good for flasks with a fill line.
Fixed Diluent Volume Calculator
Find the stock to add to a set amount of diluent. Use it when the buffer is pre-filled.
Dilution Factors & Ratios
Dilution Factor Calculator
Find how many times weaker the final mix is than the stock. A factor of 10 means ten times weaker.
Dilution Ratio Calculator
Turn a mix ratio into real volumes. You set what the ratio means.
Stock-to-Diluent Ratio Calculator
Show stock as parts of the water or buffer you add. 1:4 here means 1 part stock to 4 parts water.
Stock-to-Final Ratio Calculator
Show stock as parts of the whole final mix. 1:5 here means 1 part stock in 5 parts total.
Dilution Ratio Convention Converter
Switch between the two ways labs write a ratio. It stops 1:4 and 1:5 mix-ups.
Dilution Factor-to-Ratio Converter
Turn a dilution factor into a ratio, and back. Pick which ratio style you use.
Fold Dilution Calculator
Work with x-fold steps, such as 10-fold or 2-fold. See the new strength at each fold.
Reciprocal Dilution Calculator
Flip a dilution such as 1/100 into its factor of 100. It also reads 10⁻³ style input.
Reverse Dilution Calculator
Find the first strength from a reading on a diluted sample. Multiply the reading by the factor.
Sample Predilution Correction Calculator
Fix a result when you diluted the sample by hand first. It adds the machine's own step too.
Total Dilution Factor Calculator
Multiply each step to get the full dilution factor. Two 1:10 steps make 1:100.
Serial & Step Dilution
Serial Dilution Calculator
Find the strength in each tube of a series. Set the start, the factor and the tube count.
Twofold Serial Dilution Calculator
Halve the strength at each step. See every tube.
Tenfold Serial Dilution Calculator
Cut the strength ten times at each step. See every tube.
Custom-Factor Serial Dilution Calculator
Use the same factor you pick at every step. Try 3-fold, 4-fold or any factor.
Variable-Factor Serial Dilution Calculator
Use a new factor at each step of the series. Mix 10-fold and 2-fold steps in one series.
Serial Dilution Step Count Calculator
Find how many steps it takes to reach your target. It rounds up to whole steps.
Serial Dilution Factor Solver
Find the step factor that links your first and last tube. Set the count of tubes you want.
Serial Dilution Transfer Volume Calculator
Find how much to move from tube to tube. Each tube ends with the same volume.
Serial Dilution Diluent Calculator
Find the water or buffer for each tube. Fill each tube first, then transfer.
Serial Dilution Retained Volume Calculator
See how much is left in each tube after you move some on. The last tube keeps its full volume.
Serial Dilution Stock Requirement Calculator
Find how much stock the whole series uses. Add a bit extra for the pipette.
Serial Dilution Reagent Budget Calculator
Add up the sample and buffer for the whole series. Order enough before you start.
Multi-Stage & Series Planning
Intermediate Stock Calculator
Add a middle step when the stock is too strong to use. It keeps each transfer easy to pipette.
Multistage Dilution Planner
Split one big dilution into steps you can pipette. Each step stays in a safe range.
Direct vs Serial Dilution Comparator
Compare one big step with a series. See which uses less.
Parallel Dilution Calculator
Make each strength straight from the stock, not from the last tube. An error in one tube stays in that tube.
Geometric Concentration Series Calculator
Make a series where each step is the same times smaller. Good for dose curves on a log scale.
Linear Concentration Series Calculator
Make a series with even gaps between each strength. Good for straight-line standard curves.
Standard Curve Dilution Planner
Plan the volumes for each point on a standard curve. Each point gets its own stock and buffer volume.
Calibration Standard Back-Calculation Tool
Work back to each standard's true strength from its steps. It follows each step from the stock.
Concentration Units & Chemistry
Molarity Dilution Calculator
Dilute in M, mM, µM or nM. Mix units between stock and target.
Mass Concentration Dilution Calculator
Dilute in mg/mL, g/L and other mass units. Mix units between stock and target.
Weight/Volume Percent Dilution Calculator
Dilute in % w/v, which is grams per 100 mL. So 5% w/v is 5 g in 100 mL.
Volume/Volume Percent Dilution Calculator
Dilute in % v/v, which is mL per 100 mL. So 70% v/v is 70 mL in 100 mL.
Weight/Weight Percent Dilution Calculator
Dilute in % w/w by weight, not volume. Weigh each part on a scale.
Molality Dilution Calculator
Dilute in mol/kg. It uses the mass of the solvent.
Normality Dilution Calculator
Dilute in N. You set what counts as one unit.
PPM Dilution Calculator
Dilute in parts per million. Pick a mass or volume base.
PPB Dilution Calculator
Dilute in parts per billion for trace work. One ppb is one part in a billion.
PPT Dilution Calculator
Dilute in parts per trillion. Pick the base you need.
Ratio Strength Dilution Calculator
Work with strengths like 1:1,000 as used in drug labels. 1:1,000 means 1 g in 1,000 mL.
Concentration Unit Converter
Switch between strength units that match. It will not mix mass and mole units.
Molar Concentration Unit Converter
Switch between M, mM, µM and nM. Each step is 1,000 times.
Mass Concentration Unit Converter
Switch between g/L, mg/mL, µg/mL and more. Note that 1 mg/mL is 1 g/L.
Molarity-to-Mass Concentration Converter
Turn M into g/L with the molar mass, and back. Type the molar mass from the label.
Percent-to-PPM Converter
Turn % into ppm, and back. One % is 10,000 ppm.
Mass Fraction-to-Volume Concentration Converter
Turn % by weight into a per-volume strength. It needs the density.
Volume Fraction-to-Mass Fraction Converter
Turn % by volume into % by weight with each density.
Solution Mass-to-Volume Converter
Turn the weight of a liquid into its volume with density.
Dilution Volume Unit Converter
Switch between L, mL, µL, cups, gallons and more.
Stock Reagent & Reconstitution
Stock Solution Preparation Calculator
Find how much to weigh to make a stock of set strength.
Solid Reagent Mass Calculator
Find the grams of powder you need to weigh.
Reagent Purity Correction Calculator
Weigh a bit more when the powder is not pure.
Hydrated Reagent Calculator
Use the right weight when the salt holds water.
Reconstitution Volume Calculator
Find how much liquid to add to a dry vial.
Lyophilized Reagent Reconstitution Calculator
Add the right liquid to a freeze-dried vial.
Concentrated Reagent Molarity Calculator
Find the M of a bottle acid from its label.
Solution Mixing & Buffer Systems
Two-Solution Mixing Calculator
Mix a strong and a weak stock to hit a target.
Target Concentration Mixing Calculator
Find how much of each stock to mix for your target.
Multicomponent Solution Calculator
Track each part of a mix on its own.
Nonzero-Diluent Concentration Calculator
Use a diluent that already holds some of the solute.
Matrix-Matched Dilution Calculator
Keep the same base mix in every sample.
Nonadditive Volume Dilution Calculator
Use when the final volume is less than the sum of parts.
Solvent Composition Calculator
Track the % of each solvent in the final mix.
Residual Solvent Calculator
Find how much solvent the stock brings into the mix.
Maximum Solvent Percentage Calculator
Check that a solvent such as DMSO stays under your limit.
Buffer Component Dilution Calculator
Find the final strength of each part of a buffer.
Concentrated Buffer Calculator
Turn a 10x or 5x buffer into 1x.
Acid/Base Dilution Calculator
Dilute an acid or base. Always add acid to water.
Dilution Mass Balance Checker
Check that no solute is lost or gained along the way.
Biomolecule, Cell & Assay Dilutions
Protein Dilution Calculator
Dilute a protein stock to the strength you need.
Antibody Dilution Calculator
Turn an antibody ratio into antibody and buffer volumes.
Primary Antibody Dilution Calculator
Scale a primary antibody ratio to your blots or slides.
Secondary Antibody Dilution Calculator
Scale a secondary antibody ratio to your read step.
DNA Dilution Calculator
Dilute DNA to the ng/µL you need.
RNA Dilution Calculator
Find the RNA and water to mix for each sample.
Oligonucleotide Reconstitution Calculator
Add the right water to a dry oligo to make a stock.
PCR Primer Dilution Calculator
Make primer stocks for a PCR run.
Primer Mix Calculator
Mix two or more primers into one tube.
Sample Normalization Calculator
Bring all samples to the same strength.
Equal-Mass Sample Calculator
Load the same amount from each sample.
Cell Suspension Dilution Calculator
Dilute cells to the count per mL you need.
Viable Cell Dilution Calculator
Count only live cells when you dilute.
Cell Seeding Dilution Calculator
Find how much cell mix to add to each well or flask.
Bacterial Culture Dilution Calculator
Dilute a culture to the start point you need.
CFU Dilution Correction Calculator
Turn plate counts back into CFU per mL.
Hemocytometer Dilution Correction Calculator
Fix a cell count when you diluted before you counted.
Stain Dilution Calculator
Dilute a stain to the strength in your protocol.
Enzyme Dilution Calculator
Dilute an enzyme to the units per mL you need.
Research Compound Dilution Calculator
Make working strengths from a compound stock.
Assay Addition Dilution Calculator
Make a reagent strong enough for the dilution in the well.
Spike-In Concentration Calculator
Find the new strength after you add a spike.
Constant Solvent Assay Calculator
Keep the same solvent % in every well.
Microplate & Liquid Handling
Microplate Dilution Planner
Plan the volume for each well on a plate.
Plate Row Dilution Planner
Run a series across the rows of a plate.
Plate Column Dilution Planner
Run a series down the columns of a plate.
Replicate Dilution Calculator
Scale up when you run each sample more than once.
Checkerboard Dilution Planner
Cross two series on one plate.
Pipette Range Dilution Planner
Keep each step in the range your pipette can hold.
Pipette Increment Rounding Calculator
Round to what your pipette can set. See the new strength.
Minimum Transfer Volume Calculator
Add a middle step when a volume is too small to pipette.
Dead Volume Allowance Calculator
Add the extra that stays stuck in tubes and tips.
Preparation Overage Calculator
Make a bit more than you need so you do not run short.
Aliquot Preparation Calculator
Split one batch into small tubes of equal size.
Sample-Limited Dilution Planner
Plan your steps when you have only a little sample.
Quality Control, Error & Uncertainty
Container Capacity Checker
Check that the batch fits in your tube or bottle.
Dilution Uncertainty Calculator
See how small volume errors change the final strength.
Serial Dilution Error Calculator
See how error grows down a series.
Dilution Recovery Calculator
Compare what you measured with what you expected.
Disinfection, Cleaning & Household
Back-Calculated Sample Concentration Tool
Undo every dilution step to get the first value.
Cleaning Product Dilution Calculator
Mix a cleaner at the ratio on its label.
Bleach Dilution Calculator
Mix bleach and water the way the label says.
Disinfectant Dilution Calculator
Mix a disinfectant the way the label says.
Sanitizer Formulation Scaler
Scale a proven hand rub recipe up or down.
Alcohol Dilution Calculator
Dilute alcohol. It allows for the small drop in volume.
Hydrogen Peroxide Dilution Calculator
Dilute peroxide to the % you need.
Detergent Dilution Calculator
Find how much soap and water to mix.
Spray Bottle Dilution Calculator
Fit a label ratio to the size of your spray bottle.
Mop Bucket Dilution Calculator
Fit a label ratio to the size of your bucket.
Foam Cannon Dilution Calculator
Mix soap for a foam cannon. It counts the water the hose adds.
Chemical Injector Dilution Calculator
Find the final strength when an injector draws the mix.
Two-Stage Cleaning Dilution Calculator
Mix a premix, then let the gear dilute it again.
Specialty, Agriculture & Industry
Pool Chemical Dilution Calculator
Mix pool chemicals the way the label says.
Hydroponic Stock Dilution Calculator
Dilute plant food stock for your tank.
Fertilizer Dilution Calculator
Mix plant food at the rate on its label.
Pesticide Tank Dilution Calculator
Fill a spray tank at the rate on the label.
Paint Thinner Ratio Calculator
Thin paint at the ratio the maker gives.
Multicomponent Paint Mixing Calculator
Mix paint, hardener and thinner in the right parts.
Essential Oil Dilution Calculator
Mix an oil with a carrier at the % you pick.
Brewing Dilution Calculator
Add water to wort and see the new gravity.
Beer Alcohol Dilution Calculator
See the new ABV after you add water.
Brine Dilution Calculator
Dilute salt water to the % you need.
Generators, Reports & Batch Tools
Sugar Syrup Dilution Calculator
Dilute a sugar syrup by weight or by Brix.
Dilution Cost Calculator
Find the cost of each mixed batch.
Usable Batch Yield Calculator
See how much ready mix your stock will make.
Dilution Chart Generator
Make a chart of ratios, volumes and strengths.
Serial Dilution Diagram Generator
Draw a series as tubes with arrows.
Dilution Worksheet Generator
Make practice sheets with answers for a class.
Dilution Label Generator
Print labels with the strength, date and name.
Batch Dilution Calculator
Work out many dilutions at once.
Dilution Input Validator
Check your numbers for mistakes before you mix.
Dilution Report Generator
Save a full record of a dilution as one file.
Dilution Spreadsheet Generator
Make a sheet you can reuse for each batch.
Financial & Equity Dilution
Share Ownership Dilution Calculator
See your new stake after the firm sells new shares.
Financing Round Dilution Calculator
See how a funding round changes who owns what.
Option Pool Dilution Calculator
See how a larger option pool cuts each stake.
Convertible Security Dilution Calculator
See what happens when notes or SAFEs turn into shares.
Fully Diluted Share Count Calculator
Count every share, plus all that could become shares.
Diluted Earnings per Share Calculator
Find diluted EPS under the rules you pick.
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