Plain Reckoner
🇺🇸

Three decisions. One set of figures.

Traffic loss, profit targets and network switching — calculated locally from assumptions you control.

Measured against Transparent arithmetic and worked examples; no predicted RPM, promised earnings or account access. the data

Three free decision tools, one shared baseline. All figures below are editable examples, not earnings forecasts. Calculations stay in this browser: no account or upload. Scenarios are not kept between visits; switching language preserves your current figures.

Your monthly baseline

Use matching dates, USD revenue and pageviews. Enter cash costs separately from revenue; include owner pay only if you want it treated as a cost.

Other revenue, taxes and financing are excluded unless you account for them in your assumptions. Provider-reported session RPM cannot be used as page RPM.

Decision tool 01

What if search traffic falls?

Reduce the search portion of your traffic, then apply a separate page-RPM change. Cash costs stay fixed, so you can see the impact on profit.

Remaining monthly pageviews
70,000
Scenario monthly revenue
$840.00
Scenario cash profit
$340.00
Revenue change versus baseline
-$660.00
Page RPM needed to cover cash costs
$7.14
Formula, example and limits

Remaining pageviews = baseline × (1 − search share × search loss). Revenue = baseline revenue × remaining-traffic fraction × (1 + RPM change). With 100,000 pageviews, $1,500 revenue, $500 costs, 60% search share, 50% search loss and 20% lower RPM: 70,000 pageviews, $840 revenue and $340 cash profit.

This is a stress scenario, not a probability estimate. Search and other visitors may monetize differently; a single average RPM cannot model that difference.

Decision tool 02

How much traffic funds your profit target?

Start from the page RPM implied by the baseline. Add your costs to a monthly profit target and calculate the pageviews required at that rate.

Baseline page RPM
$15.00
Required monthly revenue
$1,500.00
Required monthly pageviews
100,000
Additional monthly pageviews
0
Formula, example and limits

Page RPM = revenue ÷ pageviews × 1,000. Required revenue = costs + target profit. Required pageviews = required revenue ÷ page RPM × 1,000, rounded up. At $15 page RPM, $500 costs and a $1,000 profit target require 100,000 pageviews.

Zero observed revenue cannot establish a positive RPM. We show an unavailable result instead of substituting a benchmark. Costs and RPM may change as traffic grows; this is not a promise of profit.

Decision tool 03

Would switching ad networks actually pay?

A higher headline RPM can be offset by fees, migration costs or lost traffic. Compare the whole scenario over a chosen period.

Candidate monthly revenue
$2,000.00
Candidate cash profit after extra fee
$1,400.00
Recurring monthly gain
$400.00
Gain over comparison period
$1,800.00
Simple payback
1.5 months
Candidate page RPM needed to break even over this period
$17.00
Formula, example and limits

Candidate revenue = remaining pageviews × candidate page RPM ÷ 1,000. Monthly gain = candidate revenue − extra fee − baseline revenue. Period gain = monthly gain × months − one-time cost. Cash costs shared by both options cancel in the gain calculation.

At the example baseline, a $20 candidate page RPM, $100 extra monthly fee and $600 migration cost produce a $400 recurring monthly gain and $1,800 gain over six months. Simple payback is 1.5 months. Use payable revenue after the network’s share in both RPMs; do not deduct that share twice. Variable revenue shares, seasonality, payment delays and network acceptance are not modeled.

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