Unit converterReady-to-Use Programs

A ready-made unit converter in Python: length, weight, volume and your own units, adapted with your details

Usually ready in 15 minutesRevisions includedQuality check
Payment protectionDetails
  • Revisions within the package are free.
  • If you do not respond within 3 days of delivery, the work is accepted automatically.
Order · $31

The money is reserved when you pay and released only once you accept the work.

A ready-made unit converter in Python: length, weight, volume and your own units, adapted with your details

Example result

Example for the Standard package

Desktop program: invoice maker for a one-person bookkeeping service

The windows

  1. Invoices: the list of past invoices with number, client, date and total; buttons New, Open and Save as PDF.
  2. New invoice: client from a drop-down list, lines with description, hours and rate, tax rate, and the total updated as you type.
  3. Clients: name, address and email, added once and picked from the list afterwards.

A part of the code

def update_total(self, *_):
    """Adds up the lines and the tax and shows the total under the table."""
    subtotal = sum(line.hours * line.rate for line in self.lines)
    tax = round(subtotal * self.tax_rate.get() / 100, 2)
    self.subtotal_label.config(text=f"Subtotal: {subtotal:,.2f}")
    self.tax_label.config(text=f"Tax: {tax:,.2f}")
    self.total_label.config(text=f"Total: {subtotal + tax:,.2f}")

In the archive

  • invoice_maker.py, the program, about 700 lines;
  • invoices.db, made on the first run, which keeps the clients and invoices;
  • settings.example.ini for your name, address and invoice number format;
  • requirements.txt with the one extra library, reportlab, which writes the PDF;
  • README: how to install Python, start the program and build an .exe with PyInstaller.

The program runs on the client's own computer. We do not build installers, sign the program or publish it.

Client: a freelance bookkeeper who writes 20–30 invoices a month in a word processor. Task: a small program with a window: pick a client, add lines, see the total with tax, save the invoice as a PDF, and keep the list of clients. Standard package: up to 3 windows and 800 lines, data in SQLite.

The client and all details are made up.

About this service

A ready-made converter for workshops, kitchens, shops, students and anyone who keeps switching between centimetres and inches, kilograms and pounds or litres and gallons. It is a typical program that we adapt with your details: the window title and labels in your language, the units you need, the number of decimals and your colours. Type a value, pick the units and see the result at once. From Standard you add units of your own, such as a box of 12 pieces or a roll of 50 metres, in a file you can edit, and recent conversions are remembered; in Premium you convert a whole list and export it. We write it in Python with Tkinter, with a README. It works offline, so it has no live currency rates; a fixed rate that you type in is possible.

What is included

  • What you getA ZIP archive with the Python code of the ready program adapted with your details, a README on installing Python, running it and building an .exe, and the code shown on the order page. From Standard, your units saved to CSV or SQLite; in Premium, list conversion with export and an error log.
  • Ready and adaptedA typical converter with your units and labels
  • Instant resultType a value and see the answer
  • Your own unitsBoxes, rolls, packs, from Standard
  • Works offlineNo accounts, nothing to sign in to
  • Build an .exeOptional steps with PyInstaller in the README

How it works

  1. 1
    Your detailsYou list the units, labels and language
  2. 2
    AdaptingWe adapt the ready program and write the README
  3. 3
    Try itYou run it on your computer
  4. 4
    ChangesYou ask for changes within your package and send any error message

What we need from you

Which kinds of units you need and the exact units in each; any units of your own with their size; the number of decimals; the language of the labels and the window title; your colours if you like; your system (Windows, macOS or Linux) and whether you want an .exe.

We will ask you:

  • Which units do you need?
  • Units of your own
  • Language and look
  • Which system will it run on?

Compare packages

BasicConverter in 1 window$16StandardConverter with your units$31PremiumFull converter$57
Deadline1 day2 days3 days
Revisions123
Codeup to 300 linesup to 800 linesup to 1,500 lines
Windows or screens1up to 3up to 6
Featuresup to 3up to 6up to 10
Settings and saved dataNoCSV or SQLiteCSV or SQLite
Export and error logNoNoYes
README with .exe build stepsYesYesYes
VersionReady-made, with your detailsReady-made, with your detailsReady-made, with your details
OrderOrderOrder

Payment protection

You pay when you order, but the money is released only for accepted work.

  • Fixed priceThe package price does not change after you pay.
  • The money is reservedWhen you pay, the amount is only reserved. It is released to the service once you accept the work.
  • Checked before deliveryEvery result goes through a quality check before it reaches you, and you see it on the order page before accepting it.
  • Free revisionsAsk for changes within your brief as many times as the package allows.
  • Acceptance after 3 daysIf within 3 days of delivery you neither accept the work nor ask for changes, it is accepted automatically. If you write in the order chat after delivery, the order waits; once we answer, we may start the 3 days again and will say so in the chat.
  • Redo or a full refundIf the result does not match your brief and the revisions did not fix it, or the work takes more than twice its deadline, write in the order chat: we will redo the work or refund the payment in full.
How it works →

Questions and answers

Is it written from scratch for me?

No. It is a ready-made, typical converter that we adapt with your details, which is why it costs less. A very different program fits the made-to-order desktop program service better.

Can it convert currencies?

Not with live rates: the program works offline. You can enter fixed rates yourself, and it uses them as given.

Can I add units later?

From Standard, units sit in a file you edit in any text editor or spreadsheet. In Basic they are listed at the top of the code.

Will I get an installer or a signed program?

No. You get the code and the steps to build an .exe yourself with PyInstaller. We do not build installers, sign the program or publish it anywhere, so Windows or macOS may warn you the first time you open it.

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