01
DIY & renovation
Soil & compost calculator for pots
Estimate soil litres and whole bags for rectangular planters, round pots and tapered pots.
- Two container shapes
- Whole bags
- Saved measurements
MeasurementsChoose your units. Costs, watts and time stay the same.
The practical toolbox
A little help.
A job well done.
For the project you’re starting, the bill you’re checking, and the numbers you’d rather not guess.
Start with what
you need to work out.
Find your next step.
10 tools to help you get started
02
DIY & renovation
Sealant cartridge calculator
Estimate whole sealant cartridges from joint dimensions, rectangular or triangular beads and your chosen allowance.
- Up to 20 estimates
- Combined totals
- Saved estimates
03
DIY & renovation
Curtain width & panel calculator
Estimate curtain panels and whole packs from your track width, chosen fullness and panel size.
- Balanced pairs
- Whole packs
- Saved measurements
04
DIY & renovation
Paint calculator for walls & ceilings
Build L-shaped or stepped rooms, estimate walls and ceilings, and round up to whole tins using your paint label.
- Room shape builder
- Multiple rooms
- Whole tins
05
DIY & renovation
Picture & gallery wall planner
Arrange your own picture frames on a measured wall. Drag, randomize and compare gallery wall layouts with centre measurements.
- Drag & drop
- Centre measurements
- Saved wall layouts
06
DIY & renovation
Equal hole spacing calculator
Space holes evenly over a measured length. Choose a count or maximum spacing and get every centre position.
- Measured diagram
- End margins
- Marking positions
07
DIY & renovation
Sink & faucet spacing planner
Picture your sink and faucet on a countertop. Check the rim gap, faucet centre and rear clearance before marking out.
- Scaled top view
- Centre coordinates
- Cutout outline
08
DIY & renovation
Flooring layout planner
Work out your vinyl or laminate cuts, share offcuts between rooms, and take a printed plan to the job.
- Visual room layouts
- Offcut reuse
- Printable plan
09
Energy & running costs
Appliance running costs
Find out what an appliance costs to run. Compare daily, monthly and yearly electricity costs.
- Watts to cost
- Daily to yearly
- Your electricity price
010
Household budget
Recurring cost calculator
See what weekly, monthly or annual payments really add up to, using the same time period.
- Compare payment periods
- Monthly equivalent
- Annual total
No matching tool yet.
Try “flooring”, “electricity” or “payments”, or browse all available tools.
Looking for a how-to? Search the guide library.
Have your measurements ready? Give these instructions to an AI assistant to create a saved link for any tool.
A quick calculation
The numbers, right here.
Open a calculator below, or choose a tool above to jump straight in.
Energy & running costsWhat does it cost to run?
Estimate an appliance’s running cost
Use your appliance’s power rating, how long it runs, and the price on your electricity bill.
Save this version with its URL. Bookmark this page or copy its link to reopen your inputs later. Save a new link after making changes. Anyone with the link can read your inputs. Results are recalculated on reopening; print a copy if you need a fixed record.
Create a saved link with AI
Give your AI assistant your measurements or figures and the instructions below. It can create a ready-to-open link for this energy-cost estimate. Open the link, check the inputs, then bookmark it or copy the URL to reuse it later.
Copy this prompt and add your information:
Read https://www.lejnel.com/energy-cost-url-guide.txt and generate a clickable saved-plan URL for my energy-cost estimate. Convert my units to the guide’s required units. Ask for missing inputs instead of guessing, and explain any assumptions. Return the link and a summary of the inputs used.
Read the URL format and examples · AI instructions for all tools
The URL contains your inputs. Anyone with the link can read them. Future calculator updates may change results; retain a printed copy when you need a fixed record.
Formula: watts ÷ 1,000 × hours per day × days × price per kWh. Assumes constant power while running. Cycling appliances need measured average consumption. Standing charges and tariffs that vary by time are excluded.
Household budgetWhat am I paying over a year?
Put recurring costs in perspective
Convert a weekly, monthly or yearly payment into an annual estimate and monthly equivalent. Use the same currency when comparing payments.
Save this version with its URL. Bookmark this page or copy its link to reopen your inputs later. Save a new link after making changes. Anyone with the link can read your inputs. Results are recalculated on reopening; print a copy if you need a fixed record.
Create a saved link with AI
Give your AI assistant your measurements or figures and the instructions below. It can create a ready-to-open link for this recurring-cost comparison. Open the link, check the inputs, then bookmark it or copy the URL to reuse it later.
Copy this prompt and add your information:
Read https://www.lejnel.com/recurring-cost-url-guide.txt and generate a clickable saved-plan URL for my recurring-cost comparison. Convert my units to the guide’s required units. Ask for missing inputs instead of guessing, and explain any assumptions. Return the link and a summary of the inputs used.
Read the URL format and examples · AI instructions for all tools
The URL contains your inputs. Anyone with the link can read them. Future calculator updates may change results; retain a printed copy when you need a fixed record.
Monthly payments × 12, or weekly payments × 52, give an annual estimate. Monthly equivalent = annual estimate ÷ 12. Assumes unchanged prices; excludes discounts, usage fees and cancellation charges.