How to Calculate Credit Card Reward Points
Points (JPY value) = spending x reward rate. With a 1% card, spending 100000 JPY earns 100000 x 0.01 = 1000 JPY in points.
Open the interactive Everyday Lifestyle tool →Formula: points = spending x rate
Key facts
| Formula | points = spending x rate |
|---|---|
| 1% card rate | 0.01 |
| 100000 JPY spend | 1000 JPY points |
| 0.5% card | 500 JPY points |
Frequently asked questions
How many points for 100000 JPY at 1%?
1000 JPY worth: 100000 x 0.01 = 1000 points (1 point = 1 JPY).
How do I compare reward rates?
Multiply your monthly spend by each rate. At 100000 JPY/month, a 1% card earns 1000 vs 500 for 0.5%.
Do bonus categories change this?
Yes. Special-store bonuses add to the base rate; this estimate uses only the base 1%.
Related pages
Points Reward Calculator is part of Everyday Lifestyle on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.
Part of GOAT Lab — 26 free, browser-based science, engineering and developer tools. No sign-up.