Accurate arithmetic calculators for part-time salary, statutory holiday entitlement, and prorated mid-month rent with transparent step-by-step working.
Zero data sent to servers. Computations execute entirely in your browser.
Full Transparency
Expandable mathematical formulas show every step and intermediate value.
Country Standards
UK 5.6-week statutory cap, Australian 4-week rule, US & CA conventions.
Shareable URLs
Bookmark or share exact calculation results via clean URL query parameters.
Available Calculators
Select a Pro Rata Calculation Tool
Choose a specialized calculator below to compute proportional part-time salaries, statutory holiday leave, or prorated tenancy rent.
Hours & Days
Employment & Payroll
Salary Calculator
Convert full-time annual salaries into pro rata part-time pay. View annual, monthly, weekly, and hourly rates alongside your full-time equivalent (FTE) percentage.
The term pro rata is Latin for "in proportion." In payroll, statutory benefits, and real estate leasing, a full amount is scaled down based on the exact fraction of time worked or occupied.
1
Part-Time Salary Formula
Calculated by dividing actual weekly working hours by full-time contract hours, then multiplying by the benchmark full-time salary.
Pro Rata Salary = (Hours Worked ÷ Full-Time Hours) × Full-Time Annual Salary
In the UK, statutory entitlement equals 5.6 weeks multiplied by days worked, subject to a strict 28-day statutory legal maximum.
UK Leave = min(5.6 × Days Worked per Week, 28)
Example: 3 days/week = 5.6 × 3 = 16.8 days statutory paid leave per year.
3
Prorated Rent Formulas
Calculates daily rental rate and multiplies by inclusive occupancy days (Move-Out − Move-In + 1) using either actual days or a 30-day base.
Actual-Days Rent = (Monthly Rent ÷ Days in Month) × Occupancy Days
Example: $1,500/mo, 17 days occupied in a 31-day month = $822.58 (actual) or $800.00 (30-day).
Practical Applications
When Do You Need a Pro Rata Calculation?
Pro rata calculations arise across numerous everyday employment and residential agreements. Here are four common scenarios where accurate math protects your wallet.
💼
Part-Time Hours Shift
When transitioning from 40 hours to 30 or 24 hours per week, confirm that your pro rata salary and hourly equivalent remain completely fair and aligned with your contract.
📅
Mid-Month Start Date
If your employment begins midway through a pay cycle, determine your calendar-day earnings estimate for your first partial paycheck before full payroll cycles begin.
🏖️
Resignation & Leave Accrual
Leaving an employer mid-year? Accurately figure out your untaken accrued statutory holiday entitlement to verify your final termination payout.
🏠
Partial Month Move-In
Tenants moving in on the 10th or 15th of the month can verify that their landlord's prorated charge matches the contractual calculation standard.
Quick Reference
Full-Time Equivalent (FTE) & Salary Matrix
Standard pro rata comparisons based on a benchmark 40-hour full-time work week and standard statutory holiday scaling.
Weekly Hours
FTE Ratio
£30k / $30k Base
£50k / $50k Base
£75k / $75k Base
UK Statutory Leave
40 hrs (Full-time)
1.00 (100%)
30,000
50,000
75,000
28.0 days (capped)
32 hrs (4 days)
0.80 (80%)
24,000
40,000
60,000
22.4 days
24 hrs (3 days)
0.60 (60%)
18,000
30,000
45,000
16.8 days
20 hrs (Half-time)
0.50 (50%)
15,000
25,000
37,500
14.0 days
16 hrs (2 days)
0.40 (40%)
12,000
20,000
30,000
11.2 days
Got Questions?
Frequently Asked Questions
Clear, straightforward answers about pro rata earnings, holiday entitlement, and rental math.
What does "pro rata" mean in job offers and salary calculations?
"Pro rata" is Latin for "in proportion." In employment contracts and job adverts, an advertised pro rata salary is the annual figure a worker would receive if working full-time hours. If you work part-time, your actual gross pay is scaled down in direct proportion to your hours or days worked relative to full-time hours.
How do you calculate a pro rata salary for part-time hours?
To calculate pro rata salary, divide your scheduled part-time weekly hours by standard full-time weekly hours to calculate your Full-Time Equivalent (FTE), then multiply that fraction by the full-time annual salary. For example, working 24 hours in a 40-hour full-time position gives an FTE of 0.60. For a £30,000 full-time salary, the pro rata salary is £30,000 × 0.60 = £18,000 per year (£1,500 gross per month).
Is pro rata salary calculated before tax (gross) or after tax (net)?
Pro rata calculations always calculate gross salary before tax withholdings, National Insurance, superannuation, or social security deductions. Because income tax is calculated progressively using tax-free allowances and marginal tax brackets, your net take-home percentage is often slightly higher than your part-time FTE fraction.
How is statutory pro rata holiday calculated in the UK?
In the United Kingdom, statutory workers are entitled to 5.6 weeks of paid annual leave per year, capped at a maximum of 28 days. For part-time workers with fixed weekly working days, statutory entitlement is 5.6 multiplied by the number of days worked per week (for example, 5.6 × 3 days = 16.8 days of paid leave per year).
How does annual leave proration work for part-time employees in Australia?
Under Australia's National Employment Standards (NES), part-time employees receive 4 weeks of paid annual leave based on their ordinary weekly hours. For an employee working 20 ordinary hours per week, annual leave accrues to 80 hours per year (20 hours × 4 weeks), accumulating progressively throughout each pay period.
How do you calculate prorated rent for a mid-month move-in?
Prorated rent is calculated by dividing monthly rent by the total days in the month or billing cycle to establish a daily rate, then multiplying by the number of occupied days inclusive of the move-in date. The three primary industry conventions are Actual Days in Month, Banker's 30-Day Month, and Annual 365 Days.
What is the difference between "pro rata" and "prorated"?
There is no mathematical difference. "Pro rata" is the standard term used throughout the UK, Australia, Ireland, New Zealand, and South Africa, while "prorated" or "proration" is the prevailing term in the United States and Canada. Both describe the exact same mathematical method of proportional distribution.
Are calculations on EasyProRata private and secure?
Yes. All computations execute 100% on the client side inside your web browser. No salary data, employment dates, rental amounts, or personal parameters are ever sent to remote servers or stored in any database.
About EasyProRata
Transparent Pro Rata & Prorated Math with Zero Tracking
We build open calculation tools that disclose the full arithmetic formulas for part-time salary, statutory holiday leave, and prorated rent. All calculations run strictly in your browser with zero data collection.
