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Compound Interest Calculator – See Your Savings Grow

PDF to Word

Basic text version: this extracts the readable text from a text-based PDF and saves it as an editable Word (.doc) file you can open in Microsoft Word or Google Docs. It works on PDFs that contain real text — scanned documents and complex layouts (columns, tables, images) won’t carry over.

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Pick two or more PDFs and they’ll be combined into a single file, in the order you selected them. Everything happens in your browser — your files are never uploaded.

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      Split PDF

      Pull pages out of a PDF: either download every page as its own one-page PDF, or extract just the page range you need into a single new file.

      PDF to JPG

      Renders every page of your PDF as a JPG image and downloads them one by one (page-1.jpg, page-2.jpg…). Best for documents up to about 50 pages.

      Word to PDF

      Convert a Word document (.doc or .docx, up to 10 MB) to PDF with its layout, fonts and tables intact. Your file is sent to CloudConvert for conversion and is not stored on SavyTools.

      Word Counter

      Type or paste your text — the counts update as you write. Handy for essays, blog posts, meta descriptions and anything with a word limit.

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      Image Compressor

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      Age Calculator

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      Percentage Calculator

      The three percentage questions everyone Googles — answers update as you type.

      What is X% of Y?

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      X is what % of Y?

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      Percentage increase / decrease

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      Mortgage Calculator

      Estimate a US home loan: monthly principal & interest payment, total interest and the full cost of the loan. Taxes, insurance and HOA fees aren’t included.

      —Monthly payment
      —Loan amount
      —Total interest
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      Sales Tax Calculator

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      BMI Calculator

      Body mass index is a screening measure, not a diagnosis — it does not account for muscle mass, age or body composition. Use it as a rough guide and talk to a clinician for personal advice.

      —Your BMI
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      GPA Calculator

      Add your courses with their letter grades and credit hours — your weighted GPA updates instantly. Uses the standard 4.0 scale (A = 4.0, F = 0).

      —Weighted GPA
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      Compound Interest Calculator

      See how savings grow over time: a starting amount plus regular monthly contributions, compounded at your chosen frequency. This is a projection, not a guarantee — real returns vary.

      —Future value
      —Total you put in
      —Interest earned

      Hourly to Salary Calculator

      Turn an hourly wage into weekly, biweekly, monthly and yearly pay, assuming the same hours every week. Figures are gross pay, before taxes and deductions.

      —Weekly
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      Date Calculator

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      JSON Formatter

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      Image Format Converter

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      Small regular savings can grow surprisingly large thanks to compounding. Our free compound interest calculator shows you exactly how: enter your starting amount, a monthly contribution, the annual interest rate, and the number of years, and watch your future value, total contributions, and interest earned appear.

      Try different rates and time horizons — the difference an extra few years makes is often eye-opening.

      How to Use the Compound Interest Calculator

      1. Enter your starting principal.
      2. Add your monthly contribution (or leave it at zero).
      3. Set the annual interest rate and the number of years.
      4. Choose monthly, quarterly, or yearly compounding and see the results.

      Frequently Asked Questions

      What is compound interest?
      Compound interest is interest earned on both your original money and the interest already earned. That snowball effect is why starting early matters so much.

      How is this different from simple interest?
      Simple interest is calculated only on the principal. Compound interest grows faster because each period’s interest itself starts earning interest.

      What rate should I assume?
      It depends on the investment. Savings accounts pay very little, while long-term stock market averages have historically been far higher — use a conservative rate for planning, not an optimistic one.

      Planning a home purchase too? Our Mortgage Calculator estimates your monthly payment.