It may cost more on the outset, but imagine how much more expensive it would be to rent a stump grinder first and hire a professional after you fail to remove a stump successfully. Our research shows that the average cost to grind a stump ranges from $100 to $400 per stump with an average price per diameter of $3.If you grind the stump yourself it may cost you as little as $75 to rent a stump grinder for half a day, or $250 to $400 for a full day.One thing to know is that different companies charge for this service based on different criteria. For example:s far as stump grinder rental cost goes, you can expect to pay between $75 and $150 to rent it for half a day. If you need it for a whole day, you’ll pay between $250 and $400. Is it worth it? That depends on how much the professional stump grinding companies in your area typically charge.