Daily Interest Calculator – Calculate Interest Per Day

Daily Interest Calculator – Calculate Interest Per Day Online

Use Pocketly's Daily Interest Calculator to calculate the amount of interest on an amount per day. Input principal, annual interest rate and the number of days to get the estimated daily interest and overall interest for the specific duration.

Quick Answer: daily interest is interest that is calculated daily on the amount of money multiplied by the daily interest rate, which is the annual interest rate divided by 365. If the principal and rate stay the same, then multiply the daily interest by the number of days it is to be used for multiple days.

What Is a Daily Interest Calculator?

A daily interest calculator estimates the interest on a principal amount for a specified number of days.

It can be useful when you want to understand interest over shorter periods rather than viewing only monthly or annual figures.

The calculator uses three main inputs:

• Principal amount

• Annual interest rate

• Number of days

If daily compounding is selected, the calculation also accounts for interest being added to the balance each day.

How to Use the Daily Interest Calculator

Using the daily interest calculator online is straightforward.

1. Enter the Principal Amount

Enter the amount on which you want to calculate interest.

For example:

₹1,00,000

2. Enter the Annual Interest Rate

Enter the annual rate applicable to your calculation.

For example:

10% per annum

3. Enter the Number of Days

Enter the period for which you want to calculate interest.

For example:

30 days

4. Choose the Calculation Method

Select:

• Simple daily interest

• Compound daily interest

5. Calculate

Click Calculate Daily Interest to see the estimated daily interest, total interest and final amount.

Daily Interest Calculation Formula

For simple daily interest, you can first calculate the daily interest rate.

Daily Interest Rate = Annual Interest Rate ÷ 365

If the annual rate is entered as a percentage:

Daily Rate = Annual Interest Rate ÷ 365 ÷ 100

Daily interest can then be calculated as:

Daily Interest = Principal × Daily Interest Rate

For a period covering multiple days:

Total Interest = Principal × Daily Interest Rate × Number of Days

Daily Interest Calculation Example

Suppose you want to calculate interest on ₹1,00,000 at an annual interest rate of 10% for 30 days.

Step 1: Calculate the Daily Rate

10% ÷ 365 = approximately 0.0274% per day

Step 2: Calculate Interest Per Day

₹1,00,000 × 0.0274% ≈ ₹27.40

Step 3: Calculate Interest for 30 Days

₹27.40 × 30 ≈ ₹821.92

This example uses simple daily interest and a 365-day year. Actual financial products can use different day-count conventions and calculation methods.

Daily Interest Rate Calculator

A daily interest rate calculator converts an annual interest rate into an estimated daily rate.

The basic calculation is:

Daily Interest Rate = Annual Interest Rate ÷ 365

For example:

These rates are illustrative and assume a 365-day year.

Compound Interest Calculator Per Day

Daily compound interest works differently from simple daily interest.

With daily compounding, interest is added to the balance each day. The following day's interest can therefore be calculated on the updated balance.

The standard formula is:

A = P(1 + r/365)^(365t)

Where:

For a specific number of days, a useful equivalent is:

A = P(1 + r/365)^d

where d is the number of days.

The compound interest is:

Compound Interest = A − P

Use the compound interest calculator per day option when your calculation specifically requires daily compounding.

What Is a Compound Daily Calculator?

A compound daily calculator estimates how an amount changes when interest is compounded every day.

For example, suppose you have:

• Principal: ₹1,00,000

• Annual rate: 10%

• Period: 365 days

• Compounding frequency: Daily

With daily compounding, the estimated value after one year would be approximately ₹1,10,516, assuming a constant 10% nominal annual rate and 365 compounding periods.

The result differs from simple annual interest because each day's accumulated interest becomes part of the balance used for subsequent calculations.

Simple Daily Interest vs Compound Daily Interest

The distinction is important.

Always select the method that matches the terms of the financial product you are calculating.

Daily Percentage Calculator

A daily percentage calculator can help convert an annual percentage rate into an indicative daily percentage.

For a simple 365-day conversion:

Daily Percentage = Annual Percentage ÷ 365

For example, an annual rate of 12% gives:

12 ÷ 365 ≈ 0.03288% per day

This does not automatically mean every financial product charging 12% annually will calculate interest in exactly this way.

Lenders, banks and investment providers may use specific day-count conventions, compounding methods or contractual calculations.

How Much Is 1% Interest Per Day?

A 1% daily interest rate is substantially different from a 1% annual or monthly rate.

For simple interest:

Daily Interest = Principal × 1%

On ₹10,000:

₹10,000 × 1% = ₹100 per day

Over 30 days, simple interest would be:

₹100 × 30 = ₹3,000

The frequency attached to an interest rate therefore needs to be checked before comparing financial products.

Daily Interest vs Monthly Interest

Daily and monthly interest calculations use different periods.

Do not convert between daily and monthly rates by assumption when reviewing an actual financial product. Check the provider's calculation methodology.

Why Use a Daily Interest Calculator Online?

A daily interest calculator online removes the need to calculate daily rates manually.

You can use it to:

• Estimate interest for a specific number of days

• Convert an annual rate into a daily rate

• Calculate interest per day

• Compare different interest rates

• Compare different periods

• Calculate simple daily interest

• Estimate daily compounded interest

• Understand how time affects the calculated amount

You can change the inputs and immediately recalculate another scenario.

What Affects Daily Interest?

Principal Amount

The principal is the amount on which interest is calculated. A higher principal produces a higher amount of interest when the rate and period remain unchanged.

Interest Rate

The applicable annual or daily rate directly affects the calculation.

Number of Days

A longer period generally results in more accumulated interest.

Interest Method

Simple and compound interest can produce different results.

Day-Count Convention

Some financial products may use 365 days, 360 days or another contractual method for certain calculations.

Use the methodology specified by the relevant financial institution or agreement.

Daily Interest Calculator for Loans

A daily interest calculation can help illustrate how interest accrues over a short period, but loan interest calculations vary by lender and product.

Depending on the loan, interest may be calculated using:

• Reducing balance

• Daily outstanding balance

• Monthly reducing balance

• Other methods specified in the loan agreement

For an actual loan, use the lender's repayment schedule and Key Facts Statement or equivalent disclosure as the authoritative source.

Daily Interest Calculator for Savings and Investments

You can also use the calculator to model hypothetical growth scenarios.

However, an assumed daily rate should not be interpreted as a guaranteed investment return.

Actual returns can depend on:

• Type of investment

• Interest or return methodology

• Compounding frequency

• Fees

• Taxes

• Market performance

Use the calculator as a mathematical planning tool rather than a prediction of future investment performance.

Explore More Pocketly Calculators

Pocketly's financial calculator pages can help you understand different borrowing and growth calculations.

Compound Interest Calculator

Use the compound interest calculator to calculate how an amount can change when interest is compounded monthly, quarterly, half-yearly or annually.

[Calculate Compound Interest →]

CAGR Calculator

Use the CAGR calculator to find the annualised compounded growth rate between a beginning and ending value.

[Calculate CAGR →]

Credit Card EMI Calculator

Use the credit card EMI calculator to estimate monthly EMI, total interest and repayment for an eligible credit card EMI scenario.

[Calculate Credit Card EMI →]

Car Loan EMI Calculator

Use the car loan EMI calculator to estimate your monthly car loan EMI based on principal, interest rate and tenure.

[Calculate Car Loan EMI →]

Business Loan EMI Calculator

Use the business loan EMI calculator to estimate monthly repayments for a business financing scenario.

[Calculate Business Loan EMI →]

Axis Bank Loan EMI Calculator

Use the Axis Bank loan EMI calculator to model EMI based on the applicable loan amount, interest rate and tenure.

[Calculate Loan EMI →]

Personal Loan EMI Calculator

Want to understand how to calculate EMI for personal loan repayments? Use the Personal Loan EMI Calculator to estimate monthly EMI, total interest and repayment.

[Calculate Personal Loan EMI →]

Understand the Cost Before You Borrow

A calculator can help you understand how interest works before you make a borrowing decision.

If you need a small personal loan for an eligible expense, Pocketly provides a digital personal-loan journey. Pocketly's published information currently lists loan amounts from ₹1,000 to ₹50,000, repayment periods from 61 days to 9 months, interest of 2% to 3% per month, and applicable processing fees and APR disclosures.

Pocketly operates as the technology platform through which RBI-registered NBFC Speel Finance Company Private Limited lends personal loans. Pocketly states that borrowing costs, fees, charges and lending terms are disclosed to borrowers through its website and application.

Review the actual interest rate, APR, fees, tenure and total repayment before accepting any loan offer.

[Explore Pocketly Personal Loans →]

Frequently Asked Questions

What is a daily interest calculator?

A daily interest calculator estimates the amount of interest generated or charged per day based on the principal, applicable interest rate and calculation method.

How do I calculate daily interest?

For a basic simple-interest calculation, divide the annual interest rate by 365 and multiply the resulting daily rate by the principal amount.

How do I calculate interest for 30 days?

For simple daily interest:

30-Day Interest = Principal × (Annual Rate ÷ 365) × 30

Make sure the percentage rate is converted into decimal form before performing the calculation.

What is the daily interest rate on 10% per annum?

Using a simple 365-day conversion, 10% per annum is approximately 0.0274% per day.

How does a compound daily calculator work?

A compound daily calculator adds accumulated interest to the balance each day and calculates subsequent interest using the updated balance.

Is daily compound interest higher than simple daily interest?

When the same nominal annual rate, principal and period are used, daily compounding can result in a higher ending amount because accumulated interest becomes part of the balance used for subsequent calculations.

Can I calculate daily loan interest online?

Yes, you can estimate daily interest mathematically. Your actual loan interest should be checked against the calculation method, outstanding principal and terms specified by your lender.

Is the Daily Interest Calculator free?

Yes. Pocketly's Daily Interest Calculator can be made available as a free online financial calculation tool.

Disclaimer

The Daily Interest Calculator provides indicative mathematical estimates for informational and educational purposes. Actual interest calculations may vary depending on the financial product, compounding method, day-count convention, fees and provider terms. Calculator results do not constitute a loan offer, investment advice or guaranteed return.