Lumpsum Calculator
Future value of a one-time investment with compounding frequency and real (post-inflation) worth.
Inputs
Formula
- FV = P × (1 + r/m)^(m × t)
- Effective annual rate = (1 + r/m)^m − 1
- Real FV = FV / (1 + inflation)^t
- Doubling time ≈ 72 / rate (rule of 72)
Compounding frequency matters: the same nominal rate credited monthly beats the annual credit because interest starts earning interest sooner. The effective annual rate expresses that difference as a single comparable number — always compare products on effective, not nominal, rates.
Step-by-step calculation
- 1
Periodic rate
12% / 1
12.0000%
- 2
Number of periods
1 × 10
10
- 3
Growth factor
(1 + r/m)^(m·t)
3.1058
- 4
Future value
500,000 × factor
₹1,552,924
- 5
Real value
FV / (1 + 6%)^10
₹867,145
Assumptions
- The rate is constant and fully reinvested at each compounding date.
- No entry load, exit load or taxes deducted.
Tips
- For lump sums into equity, staggering over 3–6 months (STP) reduces timing risk.
- Use the rule of 72 for a fast mental check on doubling time.
Warnings
- A single-date entry carries valuation risk that a SIP spreads out.
Standards & references
- Compound interest (effective annual rate)
- SEBI disclosure norms
Frequently asked questions
What does the Lumpsum Calculator do?
Future value of a one-time investment with compounding frequency and real (post-inflation) worth. The Lumpsum Calculator on OneCalcApp returns the result instantly as you type, together with the formula and the substituted values.
How do I use the Lumpsum Calculator?
Enter your values in the input fields, choose the relevant units or options, and the Lumpsum Calculator recalculates automatically. You can copy, print or export the result.
Is the Lumpsum Calculator free to use?
Yes. The Lumpsum Calculator is completely free, needs no sign-up and has no usage limit on OneCalcApp.
How accurate is the Lumpsum Calculator?
It uses the standard formula FV = P × (1 + r/m)^(m × t) and full double-precision arithmetic, so results match a manual calculation to the displayed number of digits.
Does the Lumpsum Calculator work on mobile and offline?
Yes. The Lumpsum Calculator runs entirely in your browser on phones, tablets and desktops, and your inputs never leave your device.
Where can I find related tools?
OneCalcApp hosts 300+ calculators and converters, including the full Finance collection. Related tools are linked at the bottom of every page.
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