How to use the root to shoot ratio calculator
Find the ratio of root and shoot dry mass of a plant. Enter root dry mass, shoot dry mass in the fields above; the root-to-shoot ratio, root fraction of total are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “root shoot ratio”, “plant allocation”, “root to shoot biomass”, “calculate root to shoot ratio”, “find root-to-shoot ratio”.
Formula
Variables
- root — Root dry mass (g)
- shoot — Shoot dry mass (g)
Worked example
With root dry mass = 12 g, shoot dry mass = 30 g, the calculator gives root-to-shoot ratio ≈ 0.4; root fraction of total ≈ 28.57143 %.
Frequently asked questions
What is the root to shoot ratio calculator used for?
Find the ratio of root and shoot dry mass of a plant. It helps with questions such as “root shoot ratio”, “plant allocation”, “root to shoot biomass”.
What is the formula for the root to shoot ratio calculation?
Root-to-shoot ratio = root / shoot. Root fraction of total (%) = root / (root+shoot) × 100. Here root is root dry mass (g), shoot is shoot dry mass (g).
What inputs do I need for the root to shoot ratio calculator?
You need root dry mass in g, shoot dry mass in g. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the root to shoot ratio calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the root to shoot ratio result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.