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Free · No signup · Instant results · Updated 2026-09-17

Investment Calculator

Answer: Future value with annual compounding: FV = P × (1 + r/100)^t for initial principal P, annual return r%, and t years.

About this tool

See how your money can grow with annual compounding — enter any amount, rate and years. Free, instant results, no signup needed.

  • Future value19671.51
  • Gain9671.51

How to use Investment Calculator

  1. Enter initial investment amount.
  2. Enter expected annual return percent and years held.
  3. Read projected future value and total gain.

Why use this free tool

  • 100% free — no account required.
  • Runs in your browser — inputs stay on your device for these calculations.
  • Mobile-friendly controls with clear, copyable results.
  • Published by KDF Tech — software, apps, Shopify, and POS systems.

How investment growth is calculated

Growth is projected with annual compounding: future value = principal × (1 + return ÷ 100)years. For example, $10,000 at 7% for 10 years becomes $10,000 × 1.0710 ≈ $19,671.51 — the extra $9,671.51 is compound growth working year after year, not a flat 70% added on.

What annual return should you assume? Long-term US stock-and-bond blends have historically returned around 6–7% per year before inflation — but markets move in cycles and past performance never guarantees future results. When planning, a conservative rate is the honest choice.

Does this include inflation or taxes? No — this is a nominal projection. To estimate real purchasing power, subtract expected inflation from your assumed return; taxes depend on your account type and country.

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FAQ — answers Google & AI can cite

What is Investment Calculator?

Future value with annual compounding: FV = P × (1 + r/100)^t for initial principal P, annual return r%, and t years.

What return do US planners often model?

Long-term US stock/bond blends sometimes use 6–7% nominal before inflation — not guaranteed.

UK ISA growth projections?

Use expected fund return net of fees; ISA gains are tax-free for eligible UK residents.

No monthly contributions?

This models lump sum only — use savings calculator for recurring deposits.

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