LeeChuanjing Shop

Digital tools for your home and your money

Excel workbooks, PDF guides and design assets that replace the guesswork. Every product shows its working, works offline, and needs no subscription. Instant download after purchase.

Browse products Try the free calculators

All products

Five products, one checkout each, no subscription.

Home Renovation Calculator Bundle
Home Improvement

Home Renovation Calculator Bundle

Stop overbuying materials. 9 planner sheets plus a 30-page guide.

9 Excel sheets30-page PDF guideLive formulas
$14.90
View
Paycheck & Salary Toolkit
Personal Finance

Paycheck & Salary Toolkit

Know your real take-home, overtime and raise math in one click.

6 Excel sheetsTrue hourly rateOvertime & raises
$12.90
View
Excel KPI Dashboard Templates
Business

Excel KPI Dashboard Templates

Ten ready-made trackers. Plug in your numbers, get a clean dashboard in minutes.

10 workbooksNative Excel chartsConditional formatting
$24.90
View
Architectural Line Art PNG Pack
Design Assets

Architectural Line Art PNG Pack

52 clean line drawings for print, merch and social. Commercial licence included.

52 PNGs300 DPITransparent
$19.90
View
Ultimate Home & Money Bundle
Bundle

Ultimate Home & Money Bundle

Everything we make to plan your home and your money. One price.

25 Excel sheets30-page PDF guide52 PNGs
$52.70$39.90Save $12.80 (24%)
View
Save 24% — $39.90 instead of $52.70

Ultimate Home & Money Bundle

Everything we make to plan your home and your money, in one download.

  • Home Renovation Calculator Bundle — 9 estimator sheets plus a 30-page guide (worth $14.90)
  • Paycheck & Salary Toolkit — 6 sheets for hourly pay, overtime, raises and deadlines (worth $12.90)
  • Excel KPI Dashboard Templates — 10 professional trackers with charts (worth $24.90)
See what is included Buy the bundle on Gumroad

Why these are worth paying for

They show the working

Every result is a live formula pointing at your inputs. Change a number and watch the answer change — and see exactly how it was calculated.

Reference tables included

Coverage rates, waste percentages, depth recommendations, overtime thresholds and unit conversions live inside the sheets, so you stop searching for them.

Works offline

No sign-up, no subscription, no internet required once the file is on your machine. Open it in Excel, Google Sheets or Numbers.

Instant delivery

Checkout is handled by Gumroad. The download link appears on screen and in your email the moment payment clears.

Free lifetime updates

If we improve a sheet, you get the new version at no extra cost.

No macros, no add-ins

Native Excel formulas, charts and conditional formatting only. Nothing to enable, nothing to break on a different version.

Frequently asked questions

Do I need to install anything?
No. The Excel files use native formulas only — no macros, no VBA, no Power Query. If you have Excel, Google Sheets, LibreOffice Calc or Numbers, they will open and calculate.
Can I try it before buying?
Yes. The free calculators at leechuanjing.com and pay.leechuanjing.com run the same formulas as the paid sheets. If the free version answers your question, you may not need to buy anything at all.
What is the difference between the free calculators and the paid sheets?
The free calculators answer one question at a time. The paid workbooks carry the reference tables, multi-step scenarios (waste, contingency, region factors), the workbook and PDF guide, and they keep working offline.
Can I use the line art commercially?
Yes — the PNG pack includes a commercial licence. Use them on prints, mugs, tote bags, blog graphics and client work. You may not resell the PNG files themselves as a competing clip-art pack.
How do refunds work?
Because delivery is instantaneous, we cannot accept returns on downloaded files. If a file is broken or does not open, email us within 30 days and we will replace it or refund you in full. See Terms of Sale.
Do you offer bulk or team licences?
Yes. For five or more copies, or for a team, email us through the contact form for a discounted rate.