Compare Calculators

A correctly sized solar system is the difference between a great investment and a disappointment. This Solar Panel Calculator sizes your off-grid or hybrid solar system from your daily energy needs and the peak sun hours in your city, telling you the kW system and battery capacity required.

The calculation works backwards from what you actually consume: your daily kilowatt-hours divided by the usable sun hours gives the solar array size, and your night-time load determines the battery bank. Oversizing wastes money; undersizing leaves you on the grid — this tool finds the balance.

Peak sun hours vary across Pakistan — Quetta and the south see more than the northern cities. The calculator's sun-hours input lets you set the figure for your location, or use the default for a typical Pakistani city.

Beyond the array size, factor in losses: inverters, wiring and battery efficiency typically mean you should add a 20–25% margin to the theoretical size. The results here give you the honest engineering figure to discuss with installers, so you can compare quotes on an equal basis.

The currency converter is one of the most-used tools on GuruAlpha because exchange rates touch every Pakistani who sends remittances, pays tuition abroad, travels, imports goods or shops on international websites. It converts between the US Dollar, Pakistani Rupee, Euro, British Pound, Saudi Riyal and UAE Dirham using live interbank rates from our market feed.

The rates used here are interbank reference rates — the mid-market rate at which banks trade with each other. When you actually exchange money at a bank, exchange company or airport counter, you will be quoted a buy rate and a sell rate, and the spread between them is how the exchanger earns. So the converter gives you the fair value; the final rate you get depends on where you exchange.

For overseas Pakistanis, the relevant question is often the reverse: how many rupees will my dollars, pounds, riyals or dirhams buy? Because these currencies are among the most-remitted into Pakistan — from Saudi Arabia, the UAE, the UK and the US — the converter covers exactly the pairs that matter, showing both the unit rate and the converted amount in one glance.

Exchange rates move throughout the day in response to trade balances, interest rates, political news and central bank policy. The USD/PKR rate, in particular, has been shaped in recent years by the State Bank of Pakistan's management of foreign exchange reserves, IMF programmes and remittance flows. Because our feed refreshes regularly, the number you see here is a current snapshot rather than a stale reference.

Use the converter both ways — rupee to foreign currency for planning an international payment, and foreign currency to rupees for valuing remittances or overseas income. The unit-rate row (1 USD = x PKR) also tells you the direction of the currency: a rising number means the rupee is weakening against the dollar.