Dilution Ratio Calculator - Calculate Laboratory Dilution Ratios with Step-by-Step Solutions
Free dilution ratio calculator. Calculate dilution ratios, concentrations, and volumes for laboratory solutions with step-by-step solutions. Our calculator uses laboratory principles to determine all dilution relationships from any given inputs.
Last updated: October 19, 2025
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1:10
Ratio format
10
Numerical factor
10 mg/mL
Final concentration
10 mL
Solution volume
Given stock concentration: 100 mg/mL
Given final concentration: 10 mg/mL
Dilution factor = 100 / 10 = 10
Dilution ratio = 1:10
Volume needed: 10 mL
Ratio interpretation: 1 part stock + 9 parts diluent
Ratio Calculation
Ratio-based dilution calculation
Volume Calculation
Volume-based ratio calculation
Concentration
Concentration-based ratio calculation
Applications:
- • Laboratory work
- • Chemical analysis
- • Solution preparation
- • Quality control
Common Ratios
Practical Examples
Dilution Ratio Calculator Types & Features
Formula used
Ratio = 1:(Stock/Final)
Calculates dilution ratio from concentrations
Formula used
Final = Stock / Ratio
Calculates final concentration from ratio
Formula used
Ratio = 1:(Stock/Final)
Calculates ratio from concentrations
Formula used
V = (Final × Volume) / Stock
Calculates volume of stock needed
Method used
Custom Ratios
Flexible ratio calculations
Features
Complete Analysis
Comprehensive laboratory calculations
Quick Example Result
For stock 100 mg/mL to final 10 mg/mL:
Dilution Ratio
1:10
Dilution Factor
10
Final Conc.
10 mg/mL
Volume
10 mL
How Our Dilution Ratio Calculator Works
Our dilution ratio calculator uses the fundamental principles of laboratory dilution to calculate dilution ratios, concentrations, and volumes from any given inputs. The calculation applies laboratory methods and dilution theory to determine all dilution relationships.
The Fundamental Dilution Ratio Formulas
Dilution Ratio = 1:(Stock / Final)Final Concentration = Stock / Dilution FactorVolume of Stock = (Final × Volume) / StockRatio Interpretation = 1 part stock + (n-1) parts diluentThese formulas form the foundation of laboratory dilution ratio calculations and allow determination of all dilution parameters from any given values. They apply to both simple and complex dilution schemes.
Shows the dilution ratio process from stock solution to final concentration
Laboratory Foundation
Dilution ratio calculations are fundamental in laboratory work for preparing solutions of known concentrations. They are based on the principle of conservation of mass, where the amount of solute remains constant while the volume increases. This is essential for analytical chemistry, biochemistry, and molecular biology applications.
- Dilution ratio represents the relationship between stock and final solution
- Ratio format (1:X) is intuitive for laboratory work
- Volume calculations ensure accurate solution preparation
- Concentration calculations verify dilution accuracy
- All methods preserve the conservation of mass principle
- Ratios are commonly used in standard operating procedures
Sources & References
- Analytical Chemistry - Skoog, West, Holler, CrouchComprehensive coverage of dilution and concentration calculations
- Laboratory Techniques in Organic Chemistry - Mohrig, Hammond, SchatzPractical laboratory methods for solution preparation
- Khan Academy - Dilution and ConcentrationEducational resources for understanding dilution calculations
Need help with other laboratory calculations? Check out our dilution factor calculator and concentration calculator.
Get Custom Calculator for Your PlatformDilution Ratio Calculator Examples
Given Information:
- Stock concentration: 100 mg/mL
- Final concentration: 10 mg/mL
- Volume: 10 mL
- Goal: Calculate dilution ratio
Calculation Steps:
- Given stock concentration: 100 mg/mL
- Given final concentration: 10 mg/mL
- Dilution factor = 100 / 10 = 10
- Dilution ratio = 1:10
- Volume needed: 10 mL
Result: Dilution Ratio = 1:10
To prepare 10 mL of 1:10 dilution, mix 1 mL of stock solution with 9 mL of diluent.
Common Ratio
Stock 50 mg/mL, final 5 mg/mL
Result: 1:10 ratio
Volume Calculation
Stock 100 mg/mL, final 20 mg/mL, volume 25 mL
Result: 1:5 ratio, 5 mL stock needed
Frequently Asked Questions
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