Enter market and company data
Use the same unit type in both periods. Revenue, units, subscribers, or active users all work when values stay consistent.
Example data table
| Brand | Previous Revenue | Previous Market | Current Revenue | Current Market | Previous Share | Current Share | Change |
|---|---|---|---|---|---|---|---|
| Alpha Foods | 28,000 | 180,000 | 35,000 | 205,000 | 15.56% | 17.07% | +1.51 pp |
| Beacon Labs | 16,500 | 120,000 | 18,900 | 132,000 | 13.75% | 14.32% | +0.57 pp |
| Crest Mobile | 410,000 | 2,400,000 | 435,000 | 2,700,000 | 17.08% | 16.11% | -0.97 pp |
Formula used
Market Share = (Company Value ÷ Total Market Value) × 100
Absolute Change = Current Share − Previous Share
Relative Share Change = ((Current Share − Previous Share) ÷ Previous Share) × 100
Company Growth = ((Current Company Value − Previous Company Value) ÷ Previous Company Value) × 100. Market Growth uses the same structure. Outperformance Gap = Company Growth − Market Growth.
Share of Market Growth = ((Current Company Value − Previous Company Value) ÷ (Current Market Value − Previous Market Value)) × 100
How to use this calculator
- Enter the brand or company name and pick the measurement basis that matches your dataset.
- Add previous period company value and previous total market value using the same unit type.
- Add current period company value and current total market value for the comparison window.
- Optionally enter a target share, a forecast period, and forecast values for forward-looking analysis.
- Set a neutral band when you want tiny changes treated as stable rather than gain or loss.
- Press the calculate button to view the result card above the form, then export the summary as CSV or PDF.
Frequently asked questions
1. What does market share change measure?
It measures how your portion of total market activity changed between two periods. The calculator shows both percentage-point movement and relative share growth for clearer interpretation.
2. Can I use units instead of revenue?
Yes. You can use units sold, subscriptions, active users, volume, or revenue. Keep the same basis across both periods so the share comparison stays valid.
3. Why are percentage points and percent change different?
Percentage points show the direct share difference, such as 12% to 15% equaling +3 points. Percent change shows proportional movement relative to the original share.
4. What does outperformance gap mean?
It compares your company growth rate with the overall market growth rate. A positive value means the company expanded faster than the market and likely strengthened its position.
5. When should I use the neutral band?
Use it when tiny movements should count as noise rather than meaningful change. This is helpful with rounded datasets, seasonal variation, or minor reporting differences.
6. What is share of market growth?
It estimates how much of the total market increase was captured by your company. Higher values suggest the brand won a strong portion of new demand.
7. Can this calculator support forecasting?
Yes. Add forecast company and total market values to estimate a future market share and compare that projected share against the current period.
8. What input mistake causes invalid results most often?
The most common issue is mixing units, such as comparing company revenue with market units. Another is entering a company value larger than total market value.