Math · Interactive demo
How much can compound interest really grow?
Change return and starting age to see years invested through a fixed ending age of 80, doubling time and the cost of starting ten years later.
Created by ExplainerTools.
What you’ll explore
This interactive demo gives you a visual way into math. The key ideas include compound growth, exponential growth, doubling time, personal finance.
Continue learning
- Why is paper so hard to fold more than seven times? by ExplainerTools
- Curves and Surfaces by Bartosz Ciechanowski
- Hexagonal Grids by Amit Patel · Red Blob Games
- The Magnificent 2D Matrix by Nicky Case
- Basic Probability by Seeing Theory
- Probability Distributions by Seeing Theory
Explore interactive ideas in space, science, math, and more. Try a demo, read an interactive article, watch a short video, and follow what makes you curious.
New Originals
Change one thing and see why.
The three newest models, each with a short film. Watch the question, then play with the answer.
Follow your curiosity
A collection of small doors into big ideas.
Swipe or scroll for more formats →
Swipe or scroll for more subjects →
Swipe or scroll for more topics →
Make something click.
Made an explainer, or found one you love? Give it a place in the collection.


