powertoolspros.net · Hire-duration planner calculation record · PLANNING ESTIMATE

Hire-duration planner

Job / reference: ______________________________Printed date: ____

Formula registry version 1.0.0 · researched 2026-07-24

QT-12 · Quantities & time

Hire-duration planner

Count explicit start and end dates inclusively, then add whole contingency days. Optionally enter both prices for a simple arithmetic crossover — no rates are supplied or inferred.

PLANNING ESTIMATE

Entered dates and optional prices

△ Live calculation unavailable

JavaScript is off. Use the formulas, fixed worked example and blank worksheet below. The displayed values are the fixed example, not edited form output.

Method and worked example

base days = (end date − start date) + 1 calendar day

planned days = base days + entered contingency days

optional simple price ratio = entered purchase price ÷ entered weekly hire price

Worked example: Monday 20 July 2026 through Thursday 23 July 2026 is 4 inclusive calendar days; plus 1 contingency day gives 5 planned calendar days. In the fixed worked example, £400 ÷ £45 per week = 8.888… weeks, displayed as 8.9 weeks.

No external formula authority is claimed: these are calendar-date and division operations over user-entered values.

Blank worksheet

Start date / end date:

Inclusive calendar days:

Contingency days / planned days:

Optional purchase price / weekly hire price:

Simple price ratio / excluded costs:

Duration and optional price arithmetic

Result recordPLANNING ESTIMATE

Worked example

5 planned calendar days

4 inclusive calendar days + 1 contingency day

At the prices you entered, the simple price ratio is 8.9 weeks.

Duration uses calendar dates. The optional arithmetic crossover is not a hire-or-buy recommendation.

Assumptions register

2026-07-20 through 2026-07-23: 4 inclusive calendar days · 1 contingency day · Planned duration: 5 calendar days · Entered purchase price: £400 · Entered weekly hire price: £45 per week · Excluded unless included in entered prices: delivery/collection, deposits, damage waivers, consumables, maintenance, storage, finance, downtime, resale value, partial-week rules and tax differences.

Dates are counted as inclusive calendar days, including weekends and bank holidays.

Contingency is an entered whole number of calendar days.

Planned calendar days are not converted into supplier invoice charges.

The optional arithmetic crossover is a simple price ratio, not a hire-or-buy decision.

△ Actual charging terms remain separate

Calendar days are not invoice charges. Check supplier charging units, delivery and collection dates, minimum or partial-week rules and every mandatory charge. The simple ratio is arithmetic only.

PLANNING ESTIMATE. Actual charges follow the terms and charging units you have. The optional ratio excludes delivery, collection, deposits, damage waivers, consumables, maintenance, storage, finance, downtime, resale value, partial-week rules and tax differences unless those amounts are included in the prices you enter.

Source register · registry version 1.0.0

Formula researched 2026-07-24