# Basis Point Calculator

URL: https://speedycalculator.com/calculators/finance/basis-points/
Last updated: 2026-10-25

> The basis point calculator converts between basis points, percent, per mille and decimals, and works out what a change of a number of basis points means in money on a loan or investment.

## Inputs

- Basis points (bps)
- Starting rate (%)
- Loan or investment balance

## Results

- In percent
- As a decimal
- In per mille (‰)
- New rate
- Change in yearly interest

## Formula

```
1 basis point (bp) = 0.01% = 0.0001
Amount = balance × basis points ÷ 10,000
New rate = old rate + bps ÷ 100
```

## Explanation

Basis points avoid confusion when talking about changes in percentages: a rise from 4% to 4.25% is 25 basis points, which is clearer than "0.25%" (which could also mean a 0.25% relative change).

### How to use the Basis Point Calculator

- **Basis points**
- **Starting rate**
- **Loan or investment balance**
- Every result field is editable: type into **In percent** and **Basis points** plus every other field update to match.

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the number of basis points, the starting interest rate and the balance it applies to.

### Tips

- Use the nominal annual rate and pick the compounding frequency your bank or broker states.
- Small differences in return or fees compound into large differences over decades.
- Run the calculation with a cautious, a central and an optimistic return to see the range of outcomes.
- Past returns do not guarantee future returns – nothing here is investment advice.

### Common mistakes to avoid

- Comparing an APR with an APY or effective rate.
- Ignoring inflation, taxes and fees when judging a real return.
- Entering a percentage as a decimal (5 instead of 0.05 is correct here).

### Inputs explained

FieldWhat to enterBasis pointsIn bpsStarting rateIn %Loan or investment balanceAmount in your currency

### What each result means

- **In percent** = [Basis points]÷100
- **As a decimal** = [Basis points]÷10000
- **In per mille (‰)** = [Basis points]÷10
- **New rate** = [Starting rate] + [Basis points]÷100
- **Change in yearly interest** = [Loan or investment balance]×[Basis points]÷10000

### Example values

How the main result changes when **Basis points** changes and everything else stays at the example values above:

Basis points (bps)In percent (%)12.50.12518.750.1875250.2531.250.312537.50.375500.5

## Worked example

Inputs — Basis points: 25 bps; Starting rate: 4.5 %; Loan or investment balance: $300,000.

Results — **In percent = 0.25 %**; As a decimal = 0.0025; In per mille (‰) = 2.5; New rate = 4.75 %; Change in yearly interest = $750.00.

## FAQ

**How many basis points are in 1%?**
100.

**What is 50 basis points?**
0.50 percentage point.

**Why use basis points?**
They express small rate changes precisely without confusing percent and percentage points.

**What formula does the Basis Point Calculator use?**
1 basis point (bp) = 0.01% = 0.0001.