I develop a locksmith service cost calculator

I make interactive cost calculators for websites of emergency locksmith services. When a person stands in front of a slammed door at night and opens the master's website, they don't have time for long calls — they want to see an approximate price in a few seconds and understand what it consists of, and only then click the request button. That's exactly the tool I assemble: a widget where the visitor selects the lock type, type of work and call urgency, and the total amount recalculates right on the screen.

Behind the simple interface lies a calculation logic that I build together with the customer based on their real price list: basic master visit, different rates for opening a pin or lever lock, separate price for changing the cylinder and for installing a new lock completely, night or urgent surcharge. I make sure that every number on the screen is explainable — the visitor sees why the price increased, and this removes distrust before the call.

I deliver the calculator ready to embed in the site: responsive layout, calculation without page reload, the total block can be immediately connected to the application form. The work usually includes:

— analysis of lock types and types of work together with the service owner
— building the calculation formula and real-time recalculation logic
— styling the widget to match the existing site
— testing on phones and with slow internet
— brief project handover so the owner can change prices later