Calculator Hub

Calculator Hub – The Hundreds
The Hundreds Calculator Hub

10 Free Professional Tools for Business & Analytics

ROI Calculator

How to Use:

Enter your total investment and the revenue generated to calculate Return on Investment (ROI) as a percentage.

Percentage Calculator

How to Use:

Enter an original (starting) value and a new (ending) value to find the percentage increase or decrease.

Discount Calculator

How to Use:

Enter the original price and the discount percentage to calculate the final price and the amount you save.

Marketing Budget

How to Use:

Enter a total budget and allocate percentages across different marketing channels.

Break-Even Calculator

How to Use:

Enter your total fixed costs, the sale price per unit, and the variable cost per unit to find how many units you need to sell to break even.

Word Counter

How to Use:

Paste your text into the box to get an instant analysis of the word count, character count, and estimated reading time.

Excel Formula Builder

How to Use:

1. Select a formula to see a real-world scenario and an example.
2. Click “Build Your Own” and fill in the fields with your data.
3. Click “Generate” to create your custom formula.

PPC Calculator

How to Use:

Enter your campaign’s ad spend, clicks, conversions, and average order value to calculate key performance indicators.

Profit Margin

How to Use:

Enter your total revenue and total costs to find your profit margin percentage and the gross profit amount.

Import Tariff Calculator

How to Use:

Select the import/export countries to auto-fill estimated rates. Provide product value, shipping costs, and units to find the total landed cost.

⚠️ Important Disclaimer: Tariff rates shown are estimates based on November 2025 general trade data and may not reflect all product-specific classifications, trade agreements, or recent policy changes. These rates are for planning purposes only and NOT legal or financial advice. Always consult with a licensed customs broker or tax professional for exact, up-to-date rates specific to your products and situation.

📅 Rate data last updated: November 3, 2025