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Finance Calc Kit
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Week-over-Week Calculator

Calculate week-over-week growth rate and absolute changes.

Weekly metrics

Future projections

Week-over-week (WoW) growth

+20.00%

Absolute change: +200

Projection rate

+20.00%

Week 3 projection

$1,440.00

Projected future values

Compounding at +20.00% per week

PeriodProjected valueGrowth
Week 3$1,440.00+240
Week 4$1,728.00+288
Week 5$2,073.60+345.6
Week 6$2,488.32+414.72

How we calculated this

Open to see each step from your inputs to the result.

  1. 1. Calculate absolute change

    Absolute Change=Current Week−Previous Week\text{Absolute Change} = \text{Current Week} - \text{Previous Week}

    Absolute Change = 1,200.00 - 1,000.00 = +200.00

  2. 2. Calculate WoW growth rate

    WoW Growth %=Current Week−Previous WeekPrevious Week×100\text{WoW Growth \%} = \frac{\text{Current Week} - \text{Previous Week}}{\text{Previous Week}} \times 100

    WoW Growth = (200.00 / 1,000.00) * 100 = +20.00%

  3. 3. Project future weeks at the selected growth rate

    Vn=Vn−1×(1+g100)V_{n} = V_{n-1} \times \left(1 + \frac{g}{100}\right)

    Using calculated rate of +20.00% across 4 future week(s).

Report tool

What is week-over-week (WoW) growth?

Week-over-week (WoW) growth measures the percentage change in a metric from one week to the next. Startups, SaaS teams, and marketers use WoW to track revenue, active users, traffic, or sales with faster feedback than monthly reporting. This calculator shows WoW growth, absolute change, and a forward projection table. All math runs in your browser.

For the same logic on a monthly cadence, use the month-over-month calculator. For annual cadence comparisons, use the year-over-year growth calculator.

The WoW growth formula

Subtract the previous week from the current week, divide by the previous week, and multiply by 100:

WoW Growth %=Current Week−Previous WeekPrevious Week×100\text{WoW Growth \%} = \frac{\text{Current Week} - \text{Previous Week}}{\text{Previous Week}} \times 100

Worked example

If your site had 1,000 pageviews in week 1 and 1,200 in week 2:

WoW Growth=1,200−1,0001,000×100=20%\text{WoW Growth} = \frac{1{,}200 - 1{,}000}{1{,}000} \times 100 = 20\%

The projection table compounds that rate forward from week 2. Toggle custom growth to model a different weekly assumption.

WoW vs MoM vs YoY

  • Week-over-week: best for short-cycle experiments and rapid feedback.
  • Month-over-month: standard for business reviews and board reporting.
  • Year-over-year: useful for seasonal businesses and long-term trends.

Frequently asked questions

What is a good WoW growth rate for a startup?
Early-stage startups often target 5% to 7% WoW as a strong benchmark. Even 1% to 2% WoW compounds into meaningful annual growth over time.
How can I project future weekly growth?
Apply a constant weekly rate g to the current baseline. Week n equals the prior week multiplied by (1 + g/100). This calculator builds that table automatically.
Is week-over-week growth affected by seasonality?
Yes. Holidays, weekends, and seasonal shopping can swing weekly numbers. Pair WoW with month-over-month and year-over-year views for context.
What does a negative WoW growth rate mean?
A negative rate means the metric declined from the prior week. It may be a temporary dip, seasonality, or a signal to review acquisition and retention.

Resources and references

The formulas and methods in this calculator were checked against these independent sources.