KarobarKit
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Everyday Utilities · Local-first · Beta

Discount Calculator

Calculate savings and final price for one or two successive discounts without silently adding GST.

Instant result•No account•Inputs stay in your browser
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Trust record

Check the method before you rely on the result

Tier A · Runs locally in this browser
Method
Apply each user-entered discount sequentially using decimal arithmetic; effective discount is measured against the original price.
Final price = original × (1 − discount 1 ÷ 100) × (1 − discount 2 ÷ 100)
Sources
1 reviewed reference
Open the source register
Effective period
Formula-based; no statutory effective period
Last verified
10 August 2026
Review every 365 days
Reviewer status
Product and domain review: specialist approval not required
Privacy
Inputs and results stay in this browser. Values are not sent to analytics, a backend, a URL or a log, and are not saved by default.
Important limitations
  • GST, shipping, platform fees and coupons are not inferred or added.
  • Successive percentage discounts are applied to the reduced price, not added together.

Read all limitationsReport an error

Browse Everyday Utilities · Methodology · Sources

A quick guide

Use the number with context

The answer is only useful when you know what it includes and what it leaves out.

How to use it

  1. Enter the original price.
  2. Enter one discount and optionally a second successive discount.
  3. Review final price, savings and effective discount before an explicit handoff to another tool.

Formula

Final price = original × (1 − discount 1 ÷ 100) × (1 − discount 2 ÷ 100)

Two discounts of 10% and 5% are not a combined 15% reduction because the second applies after the first.

Make it concrete

Worked example

A ₹1,000 item with 10% then 5% discounts costs ₹855; total savings are ₹145 and the effective discount is 14.5%.

Boundaries

What this tool does not assume

Limitations

  • GST, shipping, platform fees and coupons are not inferred or added.
  • Successive percentage discounts are applied to the reduced price, not added together.

Edge cases

  • Discounts must be between 0% and 100%.
  • The second discount can be left blank and is then treated as zero.

Last reviewed 10 August 2026 · Formula version 1.0

Method & sources

How this result is grounded

The formula is deterministic and runs in your browser. Read the reference below for the method used by this tool.

  • Everyday Utilities methodology v1

    KarobarKit controlled methodology · authoritative reference · Checked 10 August 2026

    Supports: everyday utility formulas · rounding and scope limitations · privacy boundary

Questions

Frequently asked

Does this add GST?

No. GST is deliberately outside this calculator and must be entered or reviewed explicitly in a GST-aware workflow.

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Source register checked 10 August 2026.