日常
チップ、割引などの日常計算。
8種類の計算機
日常
Darts Scoreboard
A free online darts scoreboard. Pick 301 or 501, play with one or two players and enter your score after each turn — the board subtracts automatically, spots a bust and tracks who wins. No more mental arithmetic mid-game.
Coin Flip
No coin to hand? Flip heads or tails online here. Every toss is random and fair — 50% heads, 50% tails — so you can settle a decision quickly and impartially. The counter tracks how often heads and tails have come up.
Tip Calculator
Tipping is part of dining out, but how much is appropriate? This calculator quickly works out how much to give based on your bill and the percentage you want — and if you're out with friends, it splits automatically among everyone.
Pokémon Type Calculator
In Pokémon games, the type matchup between attack and defender determines how much damage a move deals. Choose an attack type and a (dual) defending type to see the damage multiplier.
Appliance Electricity Cost Calculator
Curious what an appliance really costs in electricity? Enter the power draw (in watts), how many hours a day it runs and your electricity price for a monthly and yearly estimate.
Fuel Cost Calculator
Before setting off on a trip, it helps to know what it will cost in fuel. Enter the distance, your car's consumption (usually L per 100 km) and the current fuel price to instantly see the amount and the litres needed. This helps you budget, compare transport options, or justify mileage reimbursement for business travel.
Unit Price Comparison Calculator
Supermarkets love keeping you in the dark about actual unit prices. This calculator directly compares what you pay per unit for two packages — so you see the real deal without marketing tricks.
Discount Calculator
Many stores make discounts confusing by showing them in different ways. How often do you see "25% off" but doubt whether it's really a good deal? This calculator shows both sides: set a discount % and see the final price, or enter two prices to reveal the hidden discount percentage. Perfect for smart shopping.
Some calculations are simply part of everyday life: splitting the tip, working out a discount, flipping a coin or keeping the darts score. This category collects handy tools for exactly those moments.
Fast, free and fuss-free — ideal on the go, in the shop, at the table or during a game.
Overview
The everyday category includes a tip calculator, a discount calculator, a darts scoreboard and a coin-flip tool.
How to use these calculators
- 1Pick the tool for your situation.
- 2Enter the amount, percentage or number of players.
- 3Use the result immediately — no account needed.
Common mistakes
- Calculating the tip on the discounted amount instead of the other way around.
- Adding two discounts: 20% + 10% is 28%, not 30%.
Tips
- Round a tip up for convenience and good service.
- Use the darts scoreboard for both 301 and 501.
よくある質問
Are these tools really free?
Yes, all everyday tools are free and require no registration.
Is the coin flip truly random?
Yes, every flip has a 50% chance of heads and 50% of tails.
Does the darts scoreboard work for two players?
Yes, you can play with one or two players, with automatic subtraction and bust detection.