PPM to Grains Per Gallon Calculator

Convert parts per million (PPM) to grains per gallon (GPG) for liquid solutions, commonly used in water treatment, chemical mixing, and industrial applications.

Input Parameters

Calculation Results

Calculation Formula

GPG = PPM × 3.78541 × (1 / Solution Density)

Where:
GPG = Grains Per Gallon
PPM = Parts Per Million
3.78541 = Conversion factor (liters in a gallon)
Solution Density = Density of the solution in g/cm³

Result

Grains Per Gallon (GPG):

PPM to Grains Per Gallon Calculator Usage Guide

Learn how to use the PPM to Grains Per Gallon Calculator and its working principles

How to Use This Calculator

  1. Enter the concentration of your solution in parts per million (PPM). This is typically measured as milligrams per liter (mg/L) for many substances.
  2. Enter the density of your solution in grams per cubic centimeter (g/cm³). For water at standard conditions, this is approximately 1.0 g/cm³. If you're unsure, you can leave this at 1.0.
  3. Click the "Calculate" button to convert PPM to GPG.
  4. The result will be displayed in grains per gallon (GPG).

When to Use This Calculator

This calculator is particularly useful in water treatment, aquarium management, and industrial chemical processes where precise concentration measurements are needed. It helps convert between different concentration units for better understanding and communication.

Example Application

For example, if you have a solution with a concentration of 50 PPM and a density of 1.02 g/cm³, the calculator will show that this is equivalent to approximately 18.41 GPG. This information can then be used to determine how much chemical needs to be added to a specific volume of water to achieve the desired concentration.