The Rent Review Specialist
ITZA Calculator
ITZA is surveyor-abbreviation meaning “area in terms of Zone A”. If you do not understand the concept of zoning then please click for an explanation. Any information that you enter under Floor and Description is entirely up to you. The only columns involved in calculation are Area (red) and R (green). Column R is the relativity for each zone Area. Entries in columns Area and R must be numbers only, no words. ITZA (blue) is the result. For how to use ITZA Calculator, here is an example:
- In the first row:
Under Floor, enter Ground (or G for short)
Under Description, enter Zone A (or A for short)
Under Area, enter 400.
Under R, enter 1
result ITZA = 400 (400 divided by 1) - If you already know the ITZA then enter it under Area and under R enter 1. The ITZA result will be the same. You can then enter the Zone A £ value to get the annual rent and monthly equivalent.
- In the second row, repeat as for the first row, except:
Under Description, enter Zone B (or B for short)
Under Area, enter 500
Under R, enter 2
result ITZA = 250 (250 divided by 2) - If part of a zone has a different relativity, then enter each area within that zone on a separate line. For example, on one line Zone B, Area 300, R 2. On the next line, Zone B, Area 200, R 3. (Result: Total ITZA 216.67)
- In the third row,
Under Floor, enter First
Under Description, enter Ancillary
Under Area, enter 300
Under R, enter 10
result ITZA = 30 (300 divided by 10) - ITZA Calculator isn’t just useful for zoning. If you are using an overall methodology then enter the area and under R enter 1: the result in ITZA will be the same area as you enter under Area. Useful for adding up areas quickly and for multiplying the total area by a £ value.
- Next, scroll down to the bottom of the table where you’ll see that the total ITZA = 680
In Enter Zone A £75.00
result ERV pa (per annum) = £51,000.00
result ERV pm (per month) = £4,250.00 (£51,000 divided by 12) - Different makes and models of electronic calculators can produce different results that might not be apparent when the result is rounded. The computer code for ITZA Calculator works with approximately 24 digits to the right of the decimal point, so there is a tendency for number rounding to go askew occasionally. Please adjust your browser width to display all five columns. ITZA Calculator viewed on a mobile or ipad all five columns might not show: swipe to reveal.