Cone Slant Height Table: Slant height by Base radius
Reference table of slant height for Cone Slant Height across a range of base radius values — exact, engine-computed figures you can read off at a glance.
Cone Slant Height Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Slant height
5.000000
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Cone Slant Height Calculator
The Cone Slant Height Calculator works out your slant height in an instant. Enter base radius and height and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the base radius.
- Enter the height.
- Read off your slant height — the calculator updates automatically, with no button to press.
Formula
The Cone Slant Height Calculator uses the formula:
Slant height = √(Base radius ^ 2 + Height ^ 2)
Worked example
For example, with base radius of 3 and height of 4, the slant height is 5.000000.
| Base radius | 3 |
|---|---|
| Height | 4 |
| Slant height | 5.000000 |
|---|
Results are estimates for educational use, not professional advice.
Key terms explained
- Radius
- The distance from the centre of a circle or sphere to its edge.
Frequently asked questions
Use the Pythagorean theorem on radius and height: slant = √(r² + h²). For radius 3 and height 4 it is 5.
It is the distance from the apex to the edge of the base along the cone's surface, not straight down the centre.
The radius, height and slant height form a right triangle, with the slant height as the hypotenuse.
It is needed for a cone's lateral surface area and for making patterns to roll a cone.
The Cone Slant Height Calculator uses the formula: Slant height = √(Base radius ^ 2 + Height ^ 2). For example, with base radius of 3 and height of 4, the slant height is 5.000000.
Enter the base radius. Enter the height. Read off your slant height — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Cone Slant Height: Formula, Steps & Examples
Learn how to calculate Cone Slant Height — the formula explained step by step, with worked examples and a free calculator to check your answer.